EVK-ANNA-B4 U-BLOX | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 43
Technical content
Datasheet sections
- 1 Quick start guide
- 1.1 Installing s-center evaluation software
- 1.2 Installing J-Link drivers
- 1.3 Installing serial port drivers
- 2 Product description
- 2.1 Overview
- 2.2 Kit includes
- 2.3 Key features
- 2.4 EVK-ANNA-B4 block diagram
- 2.5 Connectors
- 3 Setting up the evaluation board
- 3.1 Software and hardware preparation
- 3.2 Starting up
- 3.3 Measuring current consumption
- 4 Board configuration
- 4.1 Powering options
- 4.2 Disconnecting ANNA signals from board peripherals
- 5 Interfaces and peripherals
- 5.1 Buttons and LEDs
- 5.2 Arduino interface
- 5.3 Raspberry Pi compatible interface
C1-Public www.u-blox.com EVK-ANNA-B4 Evaluation kit for ANNA -B4 modules User guide Abstract This document describes how to set up the EVK-ANNA-B4 evaluation kit to evaluate ANNA-B4 series standalone Bluetooth® 5.1 low energy modules. It also describes the different options for debugging and testing the development capabilities supported by the evaluation board.
UBX-21008123 - R03 Quick start guide Page 2 of 43 C1-Public Document information Title EVK-ANNA-B4 Subtitle Evaluation kit for ANNA-B4 modules Document type User guide Document number UBX-21008123 Revision and date R03 7-Dec-2021 Disclosure restriction C1-Public This document applies to the following products: Product name Type number Firmware version PCN reference EVK-ANNA-B402U EVK-ANNA-B402U-00 N/A - EVK-ANNA-B402C EVK-ANNA-B402C-00 N/A - EVK-ANNA-B412U EVK-ANNA-B412U-00 All - EVK-ANNA-B412C EVK-ANNA-B412C-00 All - u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this document. Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only permitted with the express written permission of u-blox. The information contained herein is provided “as is” and u-blox assumes no liability for its use. No warranty, either express or implied, is given, including but not limited to, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information. This document may be revised by u-blox at any time without notice. For the most recent documents, visit www.u-blox.com. Copyright © u-blox AG.
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1 Quick start guide
EVK-ANNA-B4 software and documentation is available at www.u-blox.com/evk-search.
1.1 Installing s-center evaluation software
s-center is a powerful and easy-to-use tool for evaluating, configuring, and testing u-blox short range modules. Running on Windows 10 operating systems, the software allows end users to assess and configure u-blox short range modules using the EVK. Follow the procedure outline d below to download and install the s -center software and documentation. The software can be downloaded from the u -blox s-center product page and is available free of charge. 1. Download the latest s-center software to your computer. 2. Open the s-center setup installer to install the software. 3. Select Launch button in the installer or open the application from the Windows Start button.
1.2 Installing J-Link drivers
Follow the procedure outlined below to install the J-Link drivers needed for programming the module. 1. Connect the EVK-ANNA-B4 board to your PC using the USB cable provided with the product. 2. Verify that the USB drivers are installed successfully. If the drivers do not install automatically, see also Evaluation board setup. 3. Once the drivers are installed, a COM port is enabled in Windows. Use the Windows Device Manager to view the COM port number for the USB serial port. 4. Start s-center to communicate with the module. For EVK-ANNA-B4x2U (with external antenna), attach the antenna to the antenna cable and connect the antenna cable to the U.FL connector.
1.3 Installing serial port drivers
The EVK-ANNA-B4 EVKs have an FTDI chip mounted to provide serial port connectivity. Normally the driver for the UART is installed automatically when the board is connected, if not driver files can be retrieved form the manufacturer web site [10].
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2 Product description
2.1 Overview
The EVK-ANNA-B4 evaluation kit is a versatile development platform that allows quick prototyping of a variety of extremely low-powered Internet of Things (IoT) applications, using full Bluetooth 5.1, NFC, and IEEE 802.15.4. EVK-ANNA-B4 boards are available in the following four variants that accommodate alternative antenna and software solutions:
- EVK-ANNA-B402U – includes an open CPU ANNA-B402 module and U.FL antenna connector for connecting to external antennas.
- EVK-ANNA-B402C – includes an open CPU ANNA-B402 module with an internal 2.4 GHz antenna (integrated in the SiP).
- EVK-ANNA-B412U – includes an ANNA-B412 module, pre-flashed with u-connectXpress software, and a U.FL antenna connector for connecting to external antennas.
- EVK-ANNA-B412C – includes an ANNA-B412 module, pre-flashed with u-connectXpress software, and an internal 2.4 GHz antenna (integrated in the SiP). (a) EVK-ANNA-B402U/B412U (b) EVK-ANNA-B402C/B412C Figure 1: EVK-ANNA-B4 evaluation boards
UBX-21008123 - R03 Product description Page 7 of 43 C1-Public All ANNA-B4 standalone modules include an Arm® Cortex®-M4F microcontroller with a 64 MHz system clock, 512 kB internal flash and 128 kB RAM. EVK-ANNA-B4 evaluation boards provide access to the 33 GPIO pins and interfaces supported on ANNA-B4 modules. The interfaces are available through a variety of connectors , including Arduino™ Uno R3 [1] and Raspberry Pi [2] header connectors. The boards also support simple USB drag -and- drop programming and SEGGER J-Link debug interface that can be used with the open CPU variants of the EVK. Nordic Semiconductors, the manufacturer of the nRF528 33 SoC, provide a free Software Development Kit (SDK) that includes a broad selection of drivers, libraries, and example applications that can be used for rapid prototyping.
2.2 Kit includes
The EVK-ANNA-B4 evaluation kit includes the following:
- ANNA-B4 evaluation board
- Two 2.4 GHz antennas with U.FL connector (only for EVK-ANNA-B402U and EVK-ANNA-B412U)
- NFC antenna
- USB cable
2.3 Key features
- ANNA-B402 Open CPU, based on Nordic nRF52833 SoC, Bluetooth 5.1 Low Energy modules: o Ultra-compact SiP (6.5 x 6.5) offering both internal and external antenna options o Open CPU for embedded application development o Integrated Arm® Cortex®-M4F microcontroller with 512kB internal flash and 128 kB RAM, and
64 MHz system clock
o Full Bluetooth 5.1 functionality including long range and direction finding (AoA/ AoD) o NFC tag, Bluetooth mesh, Zigbee and Thread o HW interfaces: ▪ 33 GPIO pins ▪ 2x UART ▪ 4x SPI ▪ 16x PWM capable outputs ▪ 8x analog capable inputs ▪ 2x I2C ▪ 1x I2S ▪ 1x PDM input ▪ 1x Quadrature decoder ▪ 1x USB 2.0 o Wide 1.7-3.6 V supply range o Extended temperature range up to +105 °C o Global certification
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- ANNA-B412 with u-connectXpress software, based on Nordic nRF52833 SoC, Bluetooth 5.1 Low Energy modules: o Ultra-compact SiP (6.5 x 6.5) offering both internal and external antenna options o Pre-flashed u-connectXpress software for accelerated time to market o Integrated Arm® Cortex®-M4F microcontroller with 64 MHz system clock o Pre-flashed u-connectXpress software supporting u-blox Bluetooth Low Energy Serial Port Service, GATT client and server, beacons, Bluetooth long range, NFC™, and simultaneous peripheral and central roles. o Direction Finding (AoA/ AoD) capability, u-connectLocate is available on request o HW interfaces: ▪ 19 GPIO pins ▪ 2x UART o Bluetooth mesh, available on request o Superior security functionality with secure boot o Wide 1.7-3.6 V supply range o Extended temperature range up to +105 °C o Global certification
- EVK-ANNA-B4xx evaluation boards: o Two EVK variants: ▪ EVK-ANNA-B402 with ANNA-B402 Open CPU modules ▪ EVK-ANNA-B412 with ANNA-B412 modules with u-connectXpress software o Full UART to USB converter with a virtual COM port for control of the extended UART features of the u-connectXpress software (EVK-ANNA-B412 only) o On-board J-Link debugger/programmer with: ▪ Mass Storage Device interface to PC, for drag-and-drop programming ▪ Debug port ▪ Additional virtual COM port that connects to add-on boards, or debug UART on ANNA-B4 o Dedicated USB connector for the ANNA-B402/B412 USB interface o RGB LED and push buttons o Arduino UNO R3 and Raspberry Pi compatible pin header interfaces o Pin header connectors and level shifters allow for flexible power supply options with different jumper connections for the ANNA- B402/B412 module. The jumpers can isolate the module entirely from other functional parts of the evaluation board to save battery life and control each power net separately to measure low-power applications precisely. o Multiple board power supply options include: ▪ 5 V USB supply ▪ 5-12 V external power supply ▪ 5-12 V Arduino VIN input ▪ 3 V CR2032 coin cell battery
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2.4 EVK-ANNA-B4 block diagram
Figure 2 shows the major interfaces and internal connections supported on the EVK-ANNA-B4. Figure 2: EVK-ANNA-B4 block diagram UART to USB USB conn. Interface MCU (Program & Debug Unit) USB Hub USB conn. Batt. holder Power plug RF conn. Voltage Level Shifters UART SWD
3.3 V VCC_ANNA
reg. Protect. diodes NFC antenna connector Dedicated ANNA USB 2.0 conn. VCC_ANNA Bluetooth 802.15.4 Arduino Uno R3 interface D10 D11 D12 D13 SCL SDA VIN GND RESET ADC/Comp. GPIO/Dig. Interface GPIO/Dig. Interface UART GPIO/Dig. Int. UARTSW2 Raspberry Pi 40 pin GPIO header 3V3 GND GPIO/Digital Interface UART ID_SC ID_SD RPi_3 RPi_4 RPi_5 RPi_6 RPi_7 RPi_2 RPi_8 RPi_9 RPi_10 RPi_11 RPi_12 RPi_13 RPi_14 RPi_15 RPi_16 RPi_17 RPi_18 RPi_19 RPi_20 RPi_21 RPi_22 RPi_23 RPi_24 RPi_25 RPi_26 RPi_27 ANNA Module User RGB LED User buttons Reset button ANNA SWD conn. ANNA signal jumper header SWD UART UART COM port pin header Power selector jumper headers USB USB USB 3.3 V 3.3 V 20-pin Trace connector ETM/ITM Trace USB NFC RF VBUS VBUS CR2032 3 V 5 - 12 V ANNA COM port ANNA program & debug Additional COM port 1.7 - 3.6 V Raspberry Pi pin ANNA Open CPU function ANNA Open CPU function Arduino pin ANNA Connectivity Software function ANNA Connectivity Software function 3V3 IOREF
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2.5 Connectors
Table 1 describes the available connectors of the EVK-ANNA-B4 shown in Figure 3. Connector Function Description J5 Power supply 2.1 mm power jack. The center pin of the connector is the positive terminal. 5 – 12 V input. J17 Power supply Pin header for connecting external power supplies. 5 – 12 V input. BT1 Battery holder CR2032 coin cell battery holder. CR2032 usually has a 3 V potential when fully charged. J11 NFC antenna connector Pin header that connects to the u-blox NFC antenna included in the kit. The antenna can be mounted in either direction. J10 2.4 GHz RF antenna connector U.FL coaxial connector used to connect antennas or RF equipments. This connector is only included in the EVK-ANNA-B402U/EVK-ANNA-B412U. J12 Cortex Debug connector 10-pin, 50 mil pitch connector used to connect external debuggers to the ANNA-B4 module. ANNA-B4 modules support Serial Wire debug (SWD) and Serial Wire Viewer, but not JTAG debug. J8 Power supply, COM port and debug USB The main USB connector used to program, debug, and communicate with the ANNA module. It can also be used to power the entire board. J6 Power supply and ANNA USB port Additional USB connector that connects directly to the ANNA-B4 USB interface. The connector can also be used to power the entire board. Table 1: EVK-ANNA-B4 connector description Figure 3: Available connectors, pinout and designation 2 1 1 4 GNDVIN 5 - 12 V NFC1 GND GND NFC2 U.FL RF coax GND GND N/C VDD_IO GND SWDIO SWDCLK IO_16 N/C RESET_N BT1 J17 Power USB Debug J12 Antennas J11 J10 CR2032 Micro USB Micro USB Debug Power Antennas USB USB J5 BT1 J12 J10 J11 Board Connectors J17
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3 Setting up the evaluation board
As introduced in Overview section, EVK -ANNA-B4 boards are available for four variants that accommodate alternative antenna and software solutions. Setting up EVK -ANNA-B402 evaluation boards for the open CPU ANNA -B402 modules and EVK- ANNA-B412 evaluation boards for ANNA-B412 modules with pre -flashed u -connectXpress require different software and hardware prerequisites.
3.1 Software and hardware preparation
Before setting up EVK-ANNA-B402 and EVK-ANNA-B412 evaluation boards, some software and hardware prerequisites are needed. Installing software
- EVK-ANNA-B402 evaluation boards only J-Link drivers are needed for programming the open CPU ANNA-B402 modules. J-Link drivers are usually automatically installed on a PC correctly when the evaluation boards are plugged in. If the drivers are not installed automatically, download the J -Link driver included in the Nordic nRF Command Line Tools and follow the procedure Installing J-Link drivers to install the J-Link drivers needed for programming the open CPU ANNA -B402 modules. The drivers need only be installed once when you connect the EVK to a new computer.
- EVK-ANNA-B412 evaluation boards only EVK-ANNA-B412 evaluation boards are pre -flashed with u -connectXpress software which enables users to configure EVK-ANNA-B4 modules using AT commands with u -blox s -center evaluation software. Follow the procedure Installing s-center evaluation software to install the u- blox s-center evaluation software. Connecting external antennas 3.1.2.1 2.4 GHz antenna To evaluate the 2.4 GHz radio on the EVK-ANNA-B402U and EVK -ANNA-B412U evaluation boards , external antennas might be needed. Connect a 2.4 GHz antenna to the U.FL connector (J10) on the ANNA-B402U or ANNA-B412U module if needed. EVK-ANNA-B402C and EVK -ANNA-B412C board variants include internal antennas in the modules. External antennas are therefore not needed for evaluating t hese board variants
3.1.2.2 NFC antenna
To use any of the EVK-ANNA-B4 board variants as an NFC tag, an NFC antenna can be connected to the NFC antenna connector (J11). Power on evaluation board Before powering on the evaluation boards, make sure that the power configuration jumpers are connected according to your use cases, as described in Powering options. The default configuration described in Selecting the power configuration jumpers works for most use cases. Check the polarity of the EVK connector before connecting an external power supply to the EVK-ANNA-B4 evaluation board. Center conductor is positive (+) and the ring is negative ( -).
UBX-21008123 - R03 Setting up the evaluation board Page 12 of 43 C1-Public Plug the external power supply to the power jack connector (J5), or connect a USB host to the USB connector (J8) with a USB cable. Alternatively, you can power on a EVK-ANNA-B4 evaluation board with a CR2032 coin cell battery. See also Powering options for more details. Assigning COM ports Two COM ports are automatically assigned to the device by Windows:
- The COM port labelled “USB Serial Port” is used to communicate with the UART interface of the ANNA-B4 module.
- The COM port labelled “JLink CDC UART Port” can be used as an extra USB to the UART interface. See also Extra USB to UART interface. Windows 7 To view assigned COM ports on Windows 7: 1. Open the Control Panel and select Hardware and Sound. 2. Open the Device Manager in Devices and Printers. This opens the Device Manager window where you can view the assigned COM ports. Windows 10 To view assigned COM ports on Windows 10: 1. Right click the Windows Start button 2. Select Device Manager.
3.2 Starting up
3.2.1.1 u-connectXpress software EVK-ANNA-B412 is equipped with ANNA-B412 module that runs the u-connectXpress software. The software is preinstalled on the module. ☞ Go to the u-blox support webpage to obtain the latest available software. Instructions on reflashing the EVK-ANNA-B4 can be found in the Software section of the ANNA-B4 system integration manual [5]. 3.2.1.2 s-center evaluation software To communicate with the ANNA-B412 modules using AT commands, set the baud rate to 115200 with 8N1 flow control. See also Quick start guide . All available AT commands are described in the u-connect AT commands manual [6]. To get started with the basic use-case setup of EVK-ANNA-B412 with u-connectXpress software, see the user guide [8]. EVK-ANNA-B402
3.2.2.1 Nordic Semiconductor SDK
To use the EVK-ANNA-B402 together with Nordic Semiconductor SDK it is necessary to:
- Create your own board file
- Adapt the examples in the Nordic Semiconductor SDK to use this board file For more information about performing these tasks, see also the Software section of the ANNA-B4 system integration manual [5]. See also the u-blox short range open CPU github repository [9].
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3.2.2.2 Software debug options
Use either of the following options to debug software with EVK-ANNA-B402:
- Onboard debug solution available through the USB connector
- External debugger connected to J12 connector An external debugger is useful when powering the evaluation board with a CR2032 coin cell battery or an external power supply through the power jack connector J5. An external debugger is also useful when the MCU interface has been disconnected from the ANNA-B402 module using the jumpers on the J19 header. SEGGER J -Link software [7] is necessary to debug with the onboard J -Link hardware on the EVK-ANNA-B402.
3.3 Measuring current consumption
☞ Before starting the current consumption measurement, check the Board configuration to identify your chosen power configuration and find out what ANNA signals must subsequently be isolated. The J22 jumper pins 1 and 3 must be removed to measure the current consumption. Figure 4 shows some suggestions for connecting the various instruments when measuring module current consumption. Using an amperemeter An amperemeter should be connected in series regardless of the power source and what is being measured. In this way, the current can be measured when the ANNA module is supplied from either the onboard 3.3 V regulator or an external supply. Using a voltmeter The EVK board must be modified before module current can be measured with a voltmeter. To modify the board, s older a low resistance, high -tolerance, 0402 sized resistor to the footprint labeled R6. This resistor replace s the jumper normally positioned between J22 pins - 1 and 3 so that any current running through it produces a voltage across its terminals. Measure this voltage with the voltmeter and calculate the current using Ohm’s law.
UBX-21008123 - R03 Setting up the evaluation board Page 14 of 43 C1-Public Using an external power supply or power analyzer To measure the power consumption of the ANNA module s, connect the instrument terminals to the J22 pins, as shown in Figure 4. Since the external voltage of any connected instrument can never perfectly match the 3.3 V generated by the EVK , some small current leakage is apparent whenever the signal from the ANNA module is connected to an EVK peripheral . The leakage is typically in the order of one to several hundred nano amps. To reduce leakage current, use a second external power channel to supply the EVK peripherals. This second channel must also be used to enable PC communication when using any ANNA supply voltages other than 3.3 V. Figure 4: Different options when measuring current consumption of ANNA modules J22 VCC_IO VCC GND5 A J22 VCC_IO VCC GND5 A R6J22 VCC_IO VCC VJ22 VCC_IO VCC A Amperemeter Voltmeter One channel Two channels GND GND Onboard
3.3 V supply
1.7 - 3.6 V -.-- V
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4 Board configuration
4.1 Powering options
Power can be supplied to the board in any of the following ways:
- Through any of the USB connectors, J8 or J6
- Using the power jack, J5
- Through the Arduino interface, VIN pin.
- Using the Raspberry Pi interface 5V pins, J14.2 or J14.4
- Using the pin header, J17
- Plugging in a battery to the battery holder, BT1+ The power supply sources are distributed to the rest of the board as shown in Figure 5. Figure 5: Block diagram of the power net distribution Selecting the power configuration jumpers EVK-ANNA-B4 offers flexible powering options for the ANNA-B4 module and the board itself. To configure the power options , jumpers are added to or removed from pin headers to connect or disconnect different power nets on the evaluation board. Figure 6 provides an overview of the available power sources and targets. Figure 7 shows the location of the power configuration pin headers. ⚠ Check the jumper positions carefully. Jumpers connected with incorrect polarity, can permanently damage the components that are either ON or connected to the board. Note also that some jumpers should not be mounted simultaneously. For instance, pins 5 and 6 and pins 7 and 8 on J7 connector should not be connected at the same time the battery is connected. Diode protection 3.3 V DC/DC Regulator Fuse 5 V 3.3 V Diode protection 3 V 2.7 V Power select pin header J22 ANNA power select pin header VCC_ANNA 3.3 V 3.3 V VIN 1 .7 - 3.6 V external supply J1 and J14 Arduino and Raspberry Pi pin headers VCC VCC_IOVDD_IO ANNA module Board peripherals BT1 CR2032 3 V 5 - 12 V 5 V 5 V J17 pin 2 VIN pin header 5 - 12 V J1 pin 8 Ardunio VIN pin 5 - 12 V Diode protection USB conn. Batt. holder Power jack USB conn.
UBX-21008123 - R03 Board configuration Page 17 of 43 C1-Public Connector Pin no. Schematic net
Description
J7 1 3V3 Regulated 3.3 V net. This net is supplied by the board and is always powered when a power source is connected. 2 3V3_PI Connects to 3V3 pins of Raspberry Pi header connector J14. With a Raspberry Pi device attached, this net must be left unconnected to prevent back currents. If an add-on board HAT(Hardware Attached on Top) is connected, this net can be connected to the EVK 3.3 V supply to power the HAT.
3 VBAT_DIODE To protect the battery from current back surges, connect the battery to the ANNA
module though a protection diode using this pin.
4 VCC_ANNA Connects to J22 pin 3 from which it can be connected to the module supply pin or
5 VBAT Connects to positive side of the battery terminal (BT1+)
6 VCC_ANNA Connects to J22 pin 3 from which it can be connected to the module supply pin or
7 3V3 Regulated 3.3 V net. This net is supplied by the board and is always powered when a power source is connected.
8 VCC_ANNA Connects to J22 pin 3 from which it can be connected to the module supply pin or
9 3V3 Regulated 3.3 V net. This net is supplied by the board and is always powered when a power source is connected.
10 VDD_MCU Supply net for board functions not directly connected to the ANNA module,
includinginterfaces to the MCU, USB hub, UART to USB converter, etc.
11 GND Ground net
12 GND Ground net
J22 1 VCC ANNA module voltage supply that connects to the module VCC pin. Connects to the VCC_IO net through a 0 Ω resistor R4 by default.
2 VCC_IO Connects to the ANNA module VCC_IO pin and the VCC net through a 0 Ω resistor R4
3 VCC_ANNA Connects to J7 pins 4, 6 and 8
4 VDD_IO Supply net for level shifters, LEDs and peripherals connected directly to the ANNA
module.
5 GND Ground net
6 GND Ground net
Table 2: Pinout of connectors J7 and J22 used to configure the board power nets Default power configuration, 3.3 V The out-of-box jumper positions for the EVK-ANNA power configuration are shown in Figure 8. In this default configuration, the ANNA module is directly supplied b y the EVK board with a ll board peripherals powered up and everything running at 3.3 V.
UBX-21008123 - R03 Board configuration Page 18 of 43 C1-Public Figure 8: Jumper positions for default power configuration Connector Add jumper to pins Description J7 7, 8 Selects the board regulated 3.3 V net as source for the VCC_ANNA net 9, 10 Powers up interfaces to the MCU, USB hub, and UART to USB converter with 3.3 V J22 1, 3 Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected source for the VCC_ANNA net. 2, 4 Powers up peripherals directly connected to ANNA, such as LEDs and external memory, from the module voltage supply. Table 3: Jumper positions for default power configuration BOARD RASP PI 3V3 3V3 2 1J22 VCC_IO VCC ANNA module powerboard I/O power (optional) J22: 2-4 J22: 1-3 PC communication (optional) MCU J7: 9-10ANNA DC/DC EVB powered J7: 7-8 HAT Raspberry Pi expansion board J7: 1-2 3V3 BOARD NINA 3V3 2 1J22 VCC_IO VCC ANNA module powerboard I/O power J22: 2-4 J22: 1-3 PC communication MCUDC/DC EVB powered J7: 9-10J7: 7-8
UBX-21008123 - R03 Board configuration Page 19 of 43 C1-Public Battery powered, 3.0 – 1.7 V The configuration for using EVK-ANNA-B4 with a battery is shown Figure 9. In this configuration the battery voltage is connected to VCC_ANNA, which in turn is connected to the ANNA-B4 VCC supply. If necessary, add jumper to pins 2 and 4 of J22 to supply LEDs and other peripherals with power – but only if this does not exceed the maximum current rating of the battery. If the ANNA module must be configured, add jumper to pins 9 and 10 of J7 to connect the VDD_MCU net and enable communications between a PC and the ANNA module. ☞ Pins 9 and10 of J7 and pins 2 and 4 of J22 must be connected to communicate with the ANNA module from a PC. As connecting an extra board peripheral might deplete the battery , the EVB power configuration should be switched to the default 3.3 V configuration. ⚠ To avoid damage to the battery, do not connect pins 5 and 6 and pins 7 and 8 on J7 at the same time the battery is connected. Figure 9: Jumper positions for battery powered operation, the jumpers shown in dashed lines are optional Connector Add jumper to pins Description J7 5, 6 Selects the battery connected to the battery holder as the source for the VCC_ANNA net 9, 10 (Optional) Powers up interfaces to the MCU, USB hub, and UART to USB converter with 3.3 V J22 1, 3 Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the chosen source for the VCC_ANNA net. 2, 4 (Optional) Powers up peripherals directly connected to the ANNA module, such as LEDs and external memory, using the voltage supply to the module. Table 4: Jumper positions for battery powered operation, two jumpers are optional BOARD BATT 3V3 2 1J22 VCC_IO VCC ANNA module powerboard I/O power (optional) J22: 2-4 J22: 1-3 PC communication (optional) MCU J7: 9-10 Battery powered J7: 5-6
UBX-21008123 - R03 Board configuration Page 20 of 43 C1-Public Battery powered with protection diode, 2.7 – 1.7 V This power configuration protects the battery from current back surges. When using the NFC interface, there is a risk that the applied electromagnetic field can cause back surges on the module power lines. These back surges can damage a non-chargeable battery. To block current back surges, connect pins 3 and 4 (instead pins 5 and 6) of J7 to add a schottky diode in series with the battery, as shown in Figure 10. ☞ The diode lowers the battery voltage level by ~0.3 V. Figure 10: Jumper positions for battery-powered operation with a protection diode (dashed lines show optional jumpers) Connector Add jumper to pins Description J7 3, 4 Selects the diode-protected battery as a source for the VCC_ANNA net 9, 10 (Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V. J22 1, 3 Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected source for the VCC_ANNA net. 2, 4 (Optional) Powers up the peripherals directly connected to ANNA such as LEDs and external memory with the ANNA supply voltage. Table 5: Jumper positions for battery powered operation with a protection diode (with two optional jumpers) BOARD BATT DIODE 3V3 2 1J22 VCC_IO VCC ANNA module powerboard I/O power (optional) J22: 2-4 J22: 1-3 PC communication (optional) MCU J7: 9-10J7: 3-4 Battery powered with protection
UBX-21008123 - R03 Board configuration Page 21 of 43 C1-Public External supply, 3.6 – 1.7 V When measuring current consumption or performing other ANNA-B4 module characterization measurements, it can be useful to power the module with an external source such as a lab power supply. In these instances, all jumpers must be removed so that the required supply nets can be fed externally through the pin headers J22. More specifically , the ANNA-B4 module can be powered by connecting an external supply directly to J22, pin 1 and GND. For more information about connecting external power supplies, see also Measuring current consumption. ☞ Make sure that unpowered parts of the board are properly isolated from the ANNA module. If a voltage is applied to the signal of an unpowered device/component, current might leak through various protection circuits of this device. This might give false readings when measuring current consumption. Isolation can be achieved by removing ANNA signal jumpers. See also Disconnecting ANNA signals from board peripherals. Figure 11 below shows a few optional jumper connections that can be helpful when supplying the module with an external supply. Figure 11: Optional jumper positions while using an external power supply Connector Add jumper to pins Description J7 7, 8 (Optional) Selects the board regulated 3.3 V net as a source for the VCC_ANNA net. 9, 10 (Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V. J22 3, 4 (Optional) Powers up the peripherals directly connected to ANNA such as LEDs and external memory with the selected source for the VCC_ANNA net. Table 6: Optional jumper positions while using an external supply BOARD ANNA 3V3 J22 board I/O power (optional) J22: multiple PC communication (optional) MCUDC/DC EVB powered (optional) J7: 9-10J7: 7-8 VCC_IO VCC
56 GND
-.-- V External supply
UBX-21008123 - R03 Board configuration Page 22 of 43 C1-Public Raspberry Pi HAT When connecting a HAT to the Raspberry Pi interface, the following jumper configuration can be used as shown in Figure 12. Depending on how the ANNA module is to communicate with a test PC over USB or with the HAT, the VDD_MCU net could be left unpowered. ⚠ The 3V3_PI supply net must only be powered when connecting to a Raspberry Pi expansion board (HAT). If connecting to a Raspberry Pi board, the jumper must be disconnected. Figure 12: Jumper configuration when connected to a Raspberry Pi HAT (dashed lines show optional jumpers) Connector Add jumper to pins Description J7 1, 2 Connects the 3V3_PI net to the regulated 3.3 V supply. 7, 8 Selects the board regulated 3.3 V net as a source for the VCC_ANNA net. 9, 10 (Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V. J22 1, 3 Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the selected source for the VCC_ANNA net. 2, 4 (Optional) Powers up the peripherals directly connected to ANNA such as LEDs and external memory with the ANNA supply voltage. Table 7: Jumper configuration when connected to a Raspberry Pi HAT BOARD RASP _PI_3V3 2 1J22 VCC_IO VCC_IO VCC_ANNA VCC ANNA module powerboard I/O power (optional) J22: 2-4 J22: 1-3 PC communication (optional) MCU J7: 9-10 ANNA DC/DC EVB powered J7: 7-8 HAT Raspberry Pi expansion board J7: 1-2 3V3 3V3 3V3
UBX-21008123 - R03 Board configuration Page 23 of 43 C1-Public
4.2 Disconnecting ANNA signals from board peripherals
All evaluation board peripherals, such as level shifters, LEDs, and the interface MCU are connected to the ANNA-B4 module by default. This might not suit all evaluation scenarios. All peripherals can be switched off by disc onnecting their power supplies , but finer control is needed to isolate s pecific signals . Consequently, all ANNA module signals that are connected to board peripherals are routed through pin headers. In this way , jumpers can be added or removed to isolate or connect specific signals. Figure 13 shows the layout of the pin headers. See also Powering options. Figure 13: Jumper header connectors J19 and J9 that are used to connect/isolate specific ANNA signals Connector Pin no. Schematic net name Description J19 1 RESET_N ANNA reset signal, active low
2 RESET_N_I Connects to the Interface MCU’s reset line
3 SWDIO SWD data signal
4 SWDIO_I Interface MCU SWD data signal, used to program/debug the ANNA module
5 SWDCLK SWD clock signal
6 SWDCLK_I Interface MCU SWD data signal, used to program/debug the ANNA module
7 IO_33 ANNA-B402: GPIO, ANNA-B412: BLUE signal
8 BLUE RGB diode blue signal, active low
9 IO_32/
SWITCH_1 ANNA-B402: GPIO, can be used as either user LED output or push-button input ANNA-B412: SWITCH_1 and GREEN signal
10 GREEN RGB diode green signal, active low
11 IO_31 ANNA-B402: GPIO, can be used as user LED output, ANNA-B412: RED signal
12 RED RGB diode red signal, active low
J9 1 IO_27/ UART_DTR ANNA-B402: analog capable GPIO signal ANNA-B412: UART DTR output
2 UART_DTR_I UART to USB DTR signal
3 IO_28/
UART_DSR ANNA-B402: analog capable GPIO signal ANNA-B412: UART DSR input J9J19 J9J19 12 RESET_N_IRESET_N SWDIO SWDCLK IO_33 IO_32/SWITCH_1 IO_31 IO_27/UART_DTR IO_28/UART_DSR IO_36/UART_RTS IO_37/UART_CTS IO_19/UART_TXD IO_20/UART_RXD SWDIO_I SWDCLK_I BLUE GREEN RED UART_DTR_I UART_DSR_I UART_RTS_I UART_CTS_I UART_TXD_I UART_RXD_I ANNA Signal Jumper Header Connectors
UBX-21008123 - R03 Board configuration Page 24 of 43 C1-Public Connector Pin no. Schematic net name Description
4 UART_DSR_I UART to USB DSR signal
5 IO_36/
UART_RTS ANNA-B402: analog capable GPIO signal ANNA-B412: UART RTS output
6 UART_RTS_I UART to USB RTS signal
7 IO_37/
UART_CTS ANNA-B402: GPIO signal ANNA-B412: UART CTS input
8 UART_CTS_I UART to USB CTS signal
9 IO_19/
UART_TXD ANNA-B402: GPIO signal ANNA-B412: UART TXD output
10 UART_TXD_I UART to USB TXD signal
11 IO_20/
UART_RXD ANNA-B402: analog capable GPIO signal ANNA-B412: UART RXD input
12 UART_RXD_I UART to USB RXD signal
Table 8: Pinout of the pin header connectors - J19 and J9
UBX-21008123 - R03 Interfaces and peripherals Page 25 of 43 C1-Public
5 Interfaces and peripherals
5.1 Buttons and LEDs
Figure 14: Position of the push buttons and LEDs on the evaluation board Annotation Function Description SW0 Reset button Connected directly to the ANNA RESET_N pin. SW1 User button Push button for application use. Connected directly to the ANNA SWITCH_1 (IO_32) pin SW2 User button Push button for application use. Connected directly to the ANNA SWITCH_2 (IO_40) pin. Table 9: EVK-ANNA-B4 buttons Annotation Function Description DS1 CTS LED Connected to the ANNA UART_CTS (IO_37) pin through pin header connectorJ9 DS2 RTS LED Connected to the ANNA UART_RTS (IO_36) pin through pin header connector J9 DS3 Interface MCU LED Blinks on USB enumeration and activity, lit when the Interface MCU is connected through USB DS4 Interface MCU LED Error LED DS5 DTR LED Connected to the ANNA UART_DTR (IO_27) pin on pin header connector J9 DS6 DSR LED Connected to the ANNA UART_DSR (IO_28) pin on pin header connector J9 DS7 RXD LED Connected to the ANNA UART_RXD (IO_20) pin via pin header connector J9 DS8 TXD LED Connected to the ANNA UART_TXD (IO_19) pin on pin header connector J9 DS9 Status LED Connected to the ANNA RED (IO_31), GREEN (IO_32) and BLUE (IO_33) pins on pin header connector J19. The Status LED shows the status for the u-connect applications. ☞ See also the ANNA-B412 data sheet [3]. DS10 Power LED Connected to 3V3 power net. Table 10: EVK-ANNA-B4 LED indicators SW0 SW1 SW2 DS6 DS5 DS1 DS2 DS7 DS8 DS9 DS3 DS4 DS10 Buttons and LEDs SW0 Reset User button User button SW1 SW2 DS3 Interface MCU LED DS10 Power LED Interface MCU LED Status LED DS4 TXD LED RXD LED RTS LED CTS LED DTR LED DSR LED DS9 DS8 DS7 DS2 DS1 DS5 DS6
UBX-21008123 - R03 Interfaces and peripherals Page 26 of 43 C1-Public
5.2 Arduino interface
EVK-ANNA-B4 includes a set of pin headers and mounting holes that are compatible with certain Arduino or Arduino-inspired shields. Figure 15 shows the layout of the Arduino interface described in Table 11. For information about the specifications that must be met for a shield to be compatible with the EVK -ANNA-B4, see also Arduino shield compatibility. Figure 15: Pin headers that are compatible with some Arduino shields Conn. Pin no. Arduino pin Description Schematic net name nRF52 pin Alternate functions and notes J1 1 N/C Not Connected - - Not connected
2 IOREF I/O reference voltage
level. Selectable by user to 1.7 – 3.6 V VDD_IO - See also Interfaces and peripherals
3 RESET ANNA reset signal
input. Active low logic RESET_N P0.18 4 3.3V 3.3 V DC regulated supply output 3V3 - 5 5V 5 V regulated supply output 5V - Cannot be used as supply input, use VIN instead. Only supplied by USB VBUS.
6 GND Ground GND GND
7 GND Ground GND GND
VDD_IO RESET_N 3V3 5 V GND GND VIN IO_25 IO_24 IO_30 IO_29 UART_DSR/IO_28 UART_DTR/IO_27 IO_33 IO_31 UART_RTS/IO_36 UART_CTS/IO_37 UART_TXD/IO_19 UART_RXD/IO_20 IO_23 IO_22
10 IO_15
IO_14 N/C GND IO_48 IO_16 IO_39 IO_38 IO_40 IO_13
UBX-21008123 - R03 Interfaces and peripherals Page 27 of 43 C1-Public Conn. Pin no. Arduino pin Description Schematic net name nRF52 pin Alternate functions and notes
8 VIN External DC supply
input, 5 – 12 VDC VIN - J2 1 A0 Analog input IO_25 P0.04 Analog function capable GPIO 2 A1 Analog input IO_24 P0.05 Analog function capable GPIO 3 A2 Analog input IO_30 P0.28 Analog function capable GPIO 4 A3 Analog input IO_29 P0.29 Analog function capable GPIO
5 A4 Analog input UART_DSR/
IO_28 P0.30 Analog function capable GPIO, UART_DSR signal on ANNA-B41
6 A5 Analog input UART_DTR/
IO_27 P0.31 Analog function capable GPIO, UART_DTR signal on ANNA-B41 J3 1 D0/RX Analog I/O, UART RX UART_RXD/ IO_20 P0.02 Analog function capable GPIO, UART_RXD signal on ANNA-B41
2 D1/TX Analog I/O, UART TX UART_TXD/
IO_19 P0.03 Analog function capable GPIO, UART_TXD signal on ANNA-B41
3 D2 Digital I/O UART_CTS/
IO_37 P0.22 UART_CTS signal on ANNA-B41
4 D3 Digital I/O UART_RTS/
IO_36 P0.16 UART_RTS signal on ANNA-B41 5 D4 Digital I/O IO_31 P0.27 RED 6 D5 Digital I/O IO_33 P0.26 BLUE 7 D6 Digital I/O IO_23 P0.10 Signal not connected by default, configured for NFC use 8 D7 Digital I/O IO_22 P0.09 Signal not connected by default, configured for NFC use J4 1 D8 Digital I/O IO_13 P1.09 2 D9 Digital I/O IO_40 P0.15 SWITCH_2 on ANNA-B41. This signal is pulled low when the button SW2 is pressed 3 D10 Digital I/O IO_38 P0.19 4 D11 Digital I/O IO_39 P0.23 5 D12 Digital I/O IO_16 P1.00 6 D13 Digital I/O IO_48 P0.07
7 GND Ground GND
8 AREF Analog reference
- - Not connected 9 SDA I2C data signal IO_14 P0.11 10 SCL I2C clock signal IO_15 P0.12 Table 11: Pinout of the Arduino UNO R3 compatible interface
UBX-21008123 - R03 Interfaces and peripherals Page 28 of 43 C1-Public Arduino shield compatibility ☞ As EVK-ANNA-B4 has an I/O voltage range of 1.7-3.6 V, it can only be used with shields that support an I/O voltage in this range. EVK-ANNA-B4 has a pinout that is compatible with some Arduino, or Arduino-inspired, shields. The characteristics of certain EVK pins demand that shields support the following features:
- IOREF: The I/O voltage level of the ANNA-B4 module is 3.3 V by default, but the EVK can be modified to allow other voltages (1.7-3.6 V).
- RESET: Is connected to the RESET button (SW0).
- 3V3: A regulated 3.3 V output. Should not be used as a voltage supply input, use the VIN pin instead.
- 5V: Is only a 5 V supply output if the EVK is being powered by USB. If any other power configuration is used, this pin will be unconnected (floating). It is safe to connect an external 5 V supply to this pin even when a USB cable is connected. This pin may be used to power the board.
- VIN: Can be used as a 5 -12 V supply input to power the EVK-ANNA-B4.
- Pin 0 (RX): Is connected to the ANNA-B4 UART RX pin (ANNA pin 20).
- Pin 1 (TX): Is connected to the ANNA-B4 UART TX pin (ANNA pin 19). ☞ SCL/SDA: On some Arduino boards, the I2C signals, SCL, and SDA are connected to pins A4 and A5 and to the SCL and SDA pins in the top right-hand corner. Since these pins will be shorted together, this might cause problems when they are connected to the EVK-ANNA-B4 – in which they are not normally shorted. ☞ Digital I/O pins: For serial communication and flashing/debugging over USB, some digital I/O pins can be connected to the on-board debug MCU. In these instances, the connected pins can cause some interference on the signals that are also used by an Arduino shield. For information about disconnecting these signals from the debug MCU. See also Disconnecting ANNA signals from board peripherals.
5.3 Raspberry Pi compatible interface
EVK-ANNA-B4 includes a 33-pin GPIO header that can be used to interface with either a Raspberry Pi computer board or Raspberry Pi Hardware Attached on Top (HAT) expander. EVK-ANNA-B4 uses different hardware and software configurations depending on whether it is connected to a Pi or HAT . The default configuration is for connection to a P computer board . Compatible Raspberry Pi versions are described in Table 12 . ☞ Older Pi and HAT versions that do not use a 40-pin GPIO header are not supported. Compatible Raspberry Pi boards Raspberry Pi 1 Model A+ Raspberry Pi 1 Model B+ Raspberry Pi 2 Model B Raspberry Pi 3 Model B Raspberry Pi Zero Raspberry Pi Zero W Table 12: Compatible Raspberry Pi boards
UBX-21008123 - R03 Interfaces and peripherals Page 29 of 43 C1-Public Figure 16 shows the layout of the Raspberry Pi interface described in Table 13. Three mounting holes can be used for increasing the mechanical stability. The two holes on each side of connector J14 are common to all Raspberry Pi boards, but the third one is only compati ble with the Pi Zero boards. Figure 16: Pin header J14 that is compatible with the Raspberry Pi GPIO connectors Conn. Pin No. Raspberry Pi pin Description Schematic net name nRF52 pin Alternate functions and notes J14 1 3.3 V 3.3 V supply pin 3V3_PI - Not connected by default, see also Powering options. 2 5 V 5 V supply pin 5V - Cannot be used as supply input. Supplied by USB VBUS and protected from back powering. 3 GPIO02 Digital I/O IO_14 P0.11 4 5 V 5 V supply pin 5V - Cannot be used as supply input. Supplied by USB VBUS and protected from back powering. 5 GPIO03 Digital I/O IO_15 P0.12
7 GPIO04 Digital I/O - - N/C
3V3_PI IO_14 IO_15 N/C GND N/C IO_13 IO_17 3V3_PI IO_34 IO_22 IO_26 GND IO_47 IO_31 IO_33 UART_RTS/IO_36 UART_CTS/IO_37 IO_39 GND 5 V 5 V GND RASP_TXD RASP_RXD RESET_N GND IO_16 IO_18 GND IO_23 IO_49 IO_50 IO_51 GND IO_32 GND IO_52 IO_10 IO_48 J14 39 40 R57 R58 R59 R60 UART RESISTORS Raspberry Pi Interface
UBX-21008123 - R03 Interfaces and peripherals Page 30 of 43 C1-Public Conn. Pin No. Raspberry Pi pin Description Schematic net name nRF52 pin Alternate functions and notes 8 GPIO14 Digital I/O, UART TX/RX RASP_TXD P0.02 Connected to ANNA UART_RXD pin by default. See also UART.
9 GND Ground GND GND
10 GPIO15 Digital I/O, UART RX/TX RASP_RXD P0.03 Connected to ANNA UART_TXD pin by default. See also UART
11 GPIO17 Digital I/O - - N/C
12 GPIO18 Digital I/O RESET_N P0.18 13 GPIO27 Digital I/O IO_13 P1.09
14 GND Ground GND GND
15 GPIO22 Digital I/O IO_17 P0.00 Can be connected to IO_17 via 0 Ω resistor. Resistor not mounted by default. IO_17 is connected to 32.768 LPO crystal by default 16 GPIO23 Digital I/O IO_16 P1.00 17 3.3 V 3.3 V supply pin 3V3_PI - Not connected by default, see Powering options. 18 GPIO24 Digital I/O IO_18 P0.01 19 GPIO10 Digital I/O IO_11 P0.14
20 GND Ground GND GND
21 GPIO09 Digital I/O IO_22 P0.09 Can be connected to IO_22 via 0 Ω resistor. Resistor not mounted by default. IO_22 is connected to NFC antenna by default 22 GPIO25 Digital I/O IO_23 P0.10 Can be connected to IO_23 via 0 Ω resistor. Resistor not mounted by default. IO_23 is connected to NFC antenna by default 23 GPIO11 Digital I/O IO_26 P0.21 24 GPIO08 Digital I/O IO_49 P0.17
25 GND Ground GND GND
26 GPIO07 Digital I/O IO_50 P0.08
27 ID_SD EEPROM config I2C data
IO_47 P1.07 Can only be used to read or simulate HAT EEPROMs. See also EEPROM support.
28 ID_SC EEPROM config I2C clock
IO_51 P1.01 Can only be used to read or simulate HAT EEPROMs See also EEPROM support. 29 GPIO05 Digital I/O IO_31 P0.27
30 GND Ground GND GND
31 GPIO06 Digital I/O IO_33 P0.26 32 GPIO12 Digital I/O IO_32 P0.06 33 GPIO13 Digital I/O UART_RTS P0.16
34 GND Ground GND GND
35 GPIO19 Digital I/O UART_CTS P0.22 36 GPIO16 Digital I/O IO_52 P0.13 37 GPIO26 Digital I/O IO_39 P0.23 38 GPIO20 Digital I/O IO_10 P0.20
39 GND Ground GND GND
40 GPIO21 Digital I/O IO_48 P0.07 Table 13: Pinout of the Raspberry Pi compatible interface
UBX-21008123 - R03 Interfaces and peripherals Page 31 of 43 C1-Public Powering considerations Two voltage nets are used in the Raspberry Pi interface, 3V3_PI and 5V. Both the 3V3_PI and 5V nets can be used to power HATs, but these nets should not be used when connecting to a Raspberry Pi. See also Raspberry Pi HAT. ⚠ Do not connect the 3V3_PI power net to the 3.3 V supply when connected to a Raspberry Pi board. Failure to observe this can cause serious damage to both boards . UART The Raspberry Pi interface provides two pins that can be used for UART communications GPIO14 and GPIO15. In UART communications, signals are always connected RX < -> TX and vice -versa. This means that GPIO14 is TX on a Raspberry Pi board, but RX on a HAT. To support communication with both HATs and Pi boards, the 0 Ω resistors (R57, R58, R59 and R60) can be used to toggle the ANNA TX and RX pins between GPIO14 and GPIO15. If ANNA-B402x is used, this switch can also be made in the software. By default, the EVK -ANNA-B4 is configured to simulate a HAT, with GPIO14 connected to the ANNA UART_RXD pin and GPIO15 connected to the ANNA UART_TXD pin. EEPROM support The Raspberry Pi interface supports a unique EEPROM solution that stores the HAT specific GPIO configurations on the HAT board . The Raspberry Pi reads the configurations before configuring its GPIOs. The two pins used for this , ID_SD and ID_SC, are connected to the ANNA-B4 module. In this way, the ANNA module can either read the GPIO configuration from a HAT or simulate an EEPROM and send configurations to a connected Pi. This requires ANNA-B402 module and a custom -built application. The EEPROM solution is not mandatory. If this approach considered inappropriate, do not configure IO_47 and GPIO_51. For more information on the ID EEPROM specification, see the raspberrypi/hats pages at github.
5.4 Additional Interfaces
In addition to the normal interfaces that are most used , several other few expansion options are available to the user. These extra interfaces require some modifications to the EVB before they can be used.
UBX-21008123 - R03 Interfaces and peripherals Page 32 of 43 C1-Public Figure 17: Additional interfaces that require some soldering before use Connector annotation Pin number Schematic net name nRF52 pin J20 1 MCU_TXD - Interface MCU data output signal
2 MCU_RXD - Interface MCU data input signal
3 MCU_CTS - Interface MCU flow control input signal
4 MCU_RTS - Interface MCU flow control output signal
5 GND GND Ground
Note: Please refer to the MCU pins for sinal naming. Net names on J20 might be incorrect. J21 1 VDD_IO - Supply net for LEDs and peripherals connected directly to the ANNA module. Supply for the external memory chip.
2 SWDIO SWDIO Serial Wire Debug data I/O signal
3 GND GND Ground
4 SWDCLK SWDCLK Serial Wire Debug clock signal
6 TRACE_DATA0/SWO/
IO_16 P1.00 Serial trace data signal / Parallell trace data signal
7 N/C - Not connected
8 N/C - Not connected
9 GND GND Ground
10 RESET_N P0.18 ANNA reset signal, active low
11 N/C - Not connected
12 TRACE_CLK/IO_48 P0.07 Parallell trace clock signal
13 N/C - Not connected
14 TRACE_ DATA0/SWO/
IO_16 P1.00 Serial trace data signal / Parallell trace data signal
15 GND GND Ground
16 TRACE_ DATA1/IO_15 P0.12 Parallell trace data signal J20 J21 UART GND MCU_RTS MCU_CTS MCU_RXD MCU_TXD1 J20 UART IO_15 IO_14 IO_16 IO_13 IO_48 GND GND GND N/C N/C J21 IO_16 N/C SWDCLK RESET_N SWDIO GND N/C GND GND VDD_IO Additional Interfaces Debug and Trace Debug and Trace
UBX-21008123 - R03 Interfaces and peripherals Page 33 of 43 C1-Public Connector annotation Pin number Schematic net name nRF52 pin
17 GND GND Ground
18 TRACE_DATA2/IO_14 P0.11 Parallell trace data signal
19 GND GND Ground
20 TRACE_ DATA3/IO_13 P1.09 Parallell trace data signal Table 14: Pinout of the additional interfaces Extra USB to UART interface If the evaluation board is connected to a PC using the USB connector J8, two serial COM ports are available. The COM port labeled “JLink CDC UART” (on a Windows PC) is not normally connected to anything but is routed as a 4 -pin UART interface to the pin header J20. This interface could be connected to a secondary UART interface on the ANNA-B4 module, or to a UART interface on an Arduino shield for example. CPU trace interface The Arm® Cortex®-M4F processor in ANNA-B4 modules supports tracing of CPU instructions through the 20 -pin, 50 mil pitch, Cortex Debug + ETM connector. This extended connector has the same features as J12, but also accommodates instruction trace operations through the Embedded Trace Macrocell (ETM) of the Cortex -M4 microcontroller in the ANNA-B4 module. A special external debugger is required for tracing instructions through this connector. ☞ Note that the 50 mil pitch pin header is not soldered onto the evaluation board by default.
UBX-21008123 - R03 Appendix Page 34 of 43 C1-Public Appendix A Schematics ☞ Pages 2 and 6 of the schematic are intentionally omitted. Figure 18: ANNA-B4 module schematic
UBX-21008123 - R03 Appendix Page 35 of 43 C1-Public Figure 19: Interface MCU
UBX-21008123 - R03 Appendix Page 36 of 43 C1-Public Figure 20: ANNA-B4 hub, FTDI and flash schematic
UBX-21008123 - R03 Appendix Page 37 of 43 C1-Public Figure 21: ANNA-B4 headers and buttons schematic ☞ For the first prototype build (marked PT1) EVK-ANNA-B3 schematic can be used as a reference.
UBX-21008123 - R03 Appendix Page 38 of 43 C1-Public Figure 22: ANNA-B4 power supply and USB schematic
UBX-21008123 - R03 Appendix Page 39 of 43 C1-Public B Assembly drawings Figure 23: ANNA-B4 assembly drawing – top view
UBX-21008123 - R03 Appendix Page 40 of 43 C1-Public Figure 24: ANNA-B4 assembly drawing – bottom view
UBX-21008123 - R03 Appendix Page 41 of 43 C1-Public C Glossary Abbreviation Definition CTS Clear To send EVK Evaluation kit GND Ground GPIO General-Purpose Input/Output HAT Hardware Attached (on) Top LED Light-Emitting Diode MCU Micro controller unit MSD Mass storage device NFC Near Field Communication U.FL Coaxial RF connector USB Universal serial bus RTS Request To send SDK Software development kit SOIC Small outline integrated circuit SPA Serial port application UART Universal Asynchronous Receiver/Transmitter Table 15: Explanation of the abbreviations and terms used
UBX-21008123 - R03 Related documents Page 42 of 43 C1-Public Related documents [1] Arduino website, https://www.arduino.cc [2] Raspberry Pi, https://www.raspberrypi.org/ [3] ANNA-B402 data sheet, UBX-20032372 [4] ANNA-B412 data sheet, UBX-21028698 [5] ANNA-B4 system integration manual, UBX-21000517 [6] u-connectXpress short range AT commands manual, UBX-14044127 [7] SEGGER J-Link software - https://www.segger.com/jlink-software.html [8] u-connectXpress user guide, UBX-16024251 [9] https://github.com/u-blox/u-blox-sho-OpenCPU [10] FTDI Chip home page: https://ftdichip.com/ ☞ For product change notifications and regular updates of u-blox documentation, register on our website, www.u-blox.com.
Revision history
Revision Date Name Comments R01 19-July-2021 asoh,yach Initial release R02 19-Oct-2021 lalb Revised metadata and disclosure restriction class R03 7-Dec-2021 mape Added note about UART chip driver installation
UBX-21008123 - R03 Contact Page 43 of 43 C1-Public Contact For complete contact information, visit us at www.u-blox.com. u-blox Offices North, Central and South America u-blox America, Inc. Phone: +1 703 483 3180 E-mail: info_us@u-blox.com Regional Office West Coast: Phone: +1 408 573 3640 E-mail: info_us@u-blox.com Technical Support: Phone: +1 703 483 3185 E-mail: support@u-blox.com Headquarters Europe, Middle East, Africa u-blox AG Phone: +41 44 722 74 44 E-mail: info@u-blox.com Support: support@u-blox.com Asia, Australia, Pacific u-blox Singapore Pte. Ltd. Phone: +65 6734 3811 E-mail: info_ap@u-blox.com Support: support_ap@u-blox.com Regional Office Australia: Phone: +61 3 9566 7255 E-mail: info_anz@u-blox.com Support: support_ap@u-blox.com Regional Office China (Beijing): Phone: +86 10 68 133 545 E-mail: info_cn@u-blox.com Support: support_cn@u-blox.com Regional Office China (Chongqing): Phone: +86 23 6815 1588 E-mail: info_cn@u-blox.com Support: support_cn@u-blox.com Regional Office China (Shanghai): Phone: +86 21 6090 4832 E-mail: info_cn@u-blox.com Support: support_cn@u-blox.com Regional Office China (Shenzhen): Phone: +86 755 8627 1083 E-mail: info_cn@u-blox.com Support: support_cn@u-blox.com Regional Office India: Phone: +91 80 405 092 00 E-mail: info_in@u-blox.com Support: support_in@u-blox.com Regional Office Japan (Osaka): Phone: +81 6 6941 3660 E-mail: info_jp@u-blox.com Support: support_jp@u-blox.com Regional Office Japan (Tokyo): Phone: +81 3 5775 3850 E-mail: info_jp@u-blox.com Support: support_jp@u-blox.com Regional Office Korea: Phone: +82 2 542 0861 E-mail: info_kr@u-blox.com Support: support_kr@u-blox.com Regional Office Taiwan: Phone: +886 2 2657 1090 E-mail: info_tw@u-blox.com Support: support_tw@u-blox.com