EV36W50A

EV36W50A MICROCHIP | Alldatasheet

Document overview

• Manufacturer or author: Microchip Technology Inc.
• PDF pages: 37

Technical content

Features

• Certified WFI32E01PC Module
• Four User LEDs
• Two User Configurable Switch
• One Reset Switch
• On-board Temperature Sensor
• On-board Light Sensor
• 32-Mbit External SPI Flash Memory
• mikroBUS ™ Socket to Expand Functionality using MikroElectronika Click Boards
• Li-Ion/LiPo Battery Charger with Power Path Management © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 1

© 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 2

© 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 3

1. Quick References

1.1 Reference Documentation

For further details, refer to the following:

• PIC32MZ1025W104 MCU and WFI32E01 Module with Wi-Fi® and Hardware-based Security Accelerator Data Sheet (DS70005425)
• PIC32MZ W1 Software User’s Guide (DS50003034)
• PIC32MZ1025W104 MCU and WFI32E01 Module with Wi-Fi® and Hardware-based Security Accelerator Errata (DS80000912)
• MCP1727 1.5A, Low Voltage, Low Quiescent Current LDO Regulator Data Sheet (DS21999)
• MCP9808 ±0.5°C Maximum Accuracy Digital Temperature Sensor (DS20005095)
• MPLAB XC32 C/C++ Compiler User’s Guide (DS50001686)
• MPLAB X IDE User’s Guide (DS50002027)
• MPLAB Snap In-Circuit Debugger User's Guide (DS50002787)
• MPLAB PICkit™ 4 In-Circuit Debugger User's Guide User Guide (DS50002751)
• SST26VF032B/SST26VF032BA 2.5V/3.0V 32-Mbit Serial Quad I/O™ (SQI™) Flash Memory Data Sheet (DS20005218).
• Stand-Alone System Load Sharing and Li-Ion/Li-Polymer Battery Charge Management Controller Data Sheet (DS20002090)
• Universal Serial Bus Specification and Associated Documents (www.usb.org)
• mikroBUS™ Specification (www.mikroe.com/mikrobus)

1.2 Hardware Prerequisites

• EV36W50A (WFI32-IoT board) kit

1.3 Software Prerequisites

• MPLAB Integrated Development Environment (MPLAB X IDE) tool (version 5.50 or later)
• MPLAB XC32 Compiler (version 2.40 or later)
• MPLAB Snap – www.microchip.com/PG164100
• Released Out of Box (OOB) demo – www.github.com/MicrochipTech/WFI32-IoT

1.4 Acronyms and Abbreviations

Acronyms and Abbreviations Description ADC Analog-to-Digital Converter BOM Bill of Material CVD Capacitive Voltage Divider GPIO General Purpose Input Output I2C Inter-Integrated Circuit ICD In-Circuit Debugger EV36W50A Quick References © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 4

Acronyms and Abbreviations Description ICSP In-Circuit Serial Programming IoT Internet of Things JTAG Joint Test Action Group LDO Low-Dropout LED Light Emitting Diode MCU Microcontroller NC Not Connected OOB Out of Box OTG On-The-Go PCB Printed Circuit Board PKOB PICKit On-Board PPS Peripheral Pin Select PWM Pulse Width Modulation RMII Reduced Media Independent Interface RTCC Real Time Clock and Calendar RTOS Real-Time Operating System RX Receiver SCL Serial Clock SDA Serial Data SMD Surface Mount SoC System-on-Chip SPI Serial Peripheral Interface TX Transmitter UART Universal Asynchronous Receiver-Transmitter USB Universal Serial Bus EV36W50A Quick References © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 5

1. Kit Overview The WFI32-IoT board has a single-chip Wi-Fi module that supports rapid prototyping of IoT devices and demonstrates cloud connectivity. The WFI32-IoT board:

• Offers various types of on-board sensors, such as a temperature sensor and ambient light sensor to build their own applications
• Provides on-board sensors that help the user to collect the sensor data and transmit to the cloud
• Provides the WFI32E01PC module, which has a built-in crypto device that helps to make a secure and authenticated cloud connection Figure 2-1. WFI32-IoT Board (EV36W50A) – Top View Status LED (D301) User Configurable LEDs (D400, D401, D402 and D403) Battery Header (J101) Erase Header (J301) mikroBUS™ Socket (J402) Ambient Light Sensor (U401) Active LED (D300) USB Hub IC (U201) Reset Switch (SW402) SPI Flash (U403) WFI32E01PC Module Power Measurement Header (J400) User Configurable Switch1 (SW401) User Configurable Switch2 (SW400) PKOB4 Micro-B USB (J200) (Debug USB) Red LED (D100) Green LED (D101) Blue LED (D102) Voltage Regulator (U102) EV36W50A Kit Overview © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 6

Figure 2-2. WFI32-IoT Board (EV36W50A) – Bottom View Li-Ion/LiPo Charger (U101) Voltage Regulator (U104) PKOB4 Main Controller (U300) USB-to-UART Serial Converter (U202) Secondary Oscillator (Y400) Power Distribution Switch (U100) Temperature Sensor (U402)

2.1 Kit Contents

The EV36W50A (WFI32-IoT board) kit contains the following:

• A WFI32E01PC module mounted on the WFI32-IoT board
• A Type-A male to Micro-B USB cable Note: If any of the above items are missing in the kit, go to support.microchip.com or contact your local Microchip Sales office. In this user guide, there is a list of Microchip offices for sales and services provided on the last page. EV36W50A Kit Overview © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 7

1. Hardware This chapter describes the hardware features of the WFI32-IoT board. Figure 3-1. WFI32-IoT Board Block Diagram Power Switch (MIC2042) (1) 32.768 kHz Crystal Digital Temperature Sensor (MCP9808) (1) Reset Button Two User Buttons mikroBUS TM Socket Wi-Fi Module (WFI32E01PCI) (1) GPIO/I2C/UART/SPI External SPI Flash (SST26VF032B) (1) SPI1 Four User Configurable LEDsGPIO MCLR SOSC I2C GPIO Ambient Light Sensor I2C ICSP PGEC/PGEDPKOB4 Controller (ATSAME70N21B-CNT) (1) USB-UART Converter (MCP2200) (1) USB D+, D- UART USB UART1 UART3 UART UART2/ SPI2 SPI Battery Management (MCP73871) (1) Li-PO Battery Connector 4.2V Micro USB Type B USB Hub (USB2514B-IM2) (1) LDO (MCP1727) (1) LDO (MCP1727) (1) 3.3V MEMS Oscillator (DSC6011HI1B-024) (1) MEMS Oscillator (DSC6011JI1B-012) (1) Microchip Devices WFI32-IoT Board Note: 1. Using Microchip’s total system solution, which includes complementary devices, software drivers and reference designs, is highly recommended to ensure the proven performance of the WFI32-IoT boards. For more details, go to support.microchip.com or contact your local Microchip Sales office.

3.1 Power Supply

The following are the power supply sources to power the WFI32-IoT board; see the following figure:

• PKOB4 Micro-B USB (Debug USB) ( J200)
• Battery Header ( J101) EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 8

Figure 3-2. WFI32-IoT Board Power Supply Block Diagram Battery Charger MCP73871 Li-Ion/Li-Po LDO MCP1727 LDO MCP1727 3V3_PKoB 3V3_Mod USB WFI32E01PC Module USB HUB USB2514B PKoB4 ATSAME70N Peripherals 5V0 VBAT_OUT Battery Connector VBAT VBUS PKOB4 Micro-B USB (Debug USB) (J200) The Debug USB (J200) supplies power to the WFI32-IoT board from the host PC using Type-A male to Micro-B USB cable. Note: The maximum available current from the Debug USB (J200) is limited to 500 mA. The current is shared between charging the external battery (if connected) and the target application section. Battery Header (J101) Connect a 4.2V Li-ion/Li-Po battery to the battery header (J101). Notes: 1. The 4.2V Li-ion/Li-Po battery is not a part of the EV36W50A kit. 2. The minimum recommended battery capacity is 400 mAh with a battery charge voltage of 4.2V. 3. Uses a standard battery connector, which is a 2 pin, 2 mm pitch and right angle male battery header.

3.1.1 Li-ion/Li-Po Battery Charger (U101)

The WFI32-IoT board features an on-board MCP73871 Li-ion/Li-Po battery charger. The battery management circuit automatically handles the selection between the USB power supply and battery supply. The current is shared between charging the battery (if connected) and the target application section. For more details on the MCP73871 Li-ion/Li-Po battery charger, refer to the Stand-Alone System Load Sharing and Li-Ion/Li-Polymer Battery Charge Management Controller Data Sheet (DS20002090). Note: The charger is configured to limit the charge current to 100 mA to prevent the overcharging of small capacity batteries. WARNINGThe MCP73871 has a battery charge voltage of 4.2V and ensures that the battery has the same charge voltage.

3.1.2 Voltage Regulators (U102 and U104)

The following are the two on-board MCP1727 voltage regulators on the WFI32-IoT board that generate +3.3V power supply:

• U102 – Generates +3.3V that powers the WFI32E01PC module along with the associated circuits EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 9

• U104 – Generates +3.3V that powers the USB hub IC (U201), PKOB4 micro controller (U300), along with the associated circuits that connect the PKOB4 debugger to a host PC For more details on the U102 and U104 voltage regulators, refer to the MCP1727 1.5A, Low Voltage, Low Quiescent Current LDO Regulator Data Sheet (DS21999).

3.1.3 Power Measurement Header (J400)

The current measurement header (J400) measures the total current consumed by the WFI32E01PC module using a multimeter. To measure the total current consumption of the WFI32E01PC module, remove the jumper (JP401) from the J400 header and connect a voltmeter across its pins. A 1Ω resistor option available on-board across the jumper gives a 1:1 relationship between the voltage drop and current consumption. For the direct current measurement, use a jumper wire to short the J400 pin 1-2 and connect a current clamp probe, for example, the TEKTRONIX TCP0030A current probe. The normal probes with long wires may add a load to the current path and introduce a voltage drop, which leads to incorrect readings. For the current measurement in terms of voltage, mount the R400 with 0.1Ω resistor for Active mode and 1Ω resistor for Sleep mode current consumption using a voltage probe or multimeter.

3.2 MPLAB PICKit On-Board 4 (PKOB4)

The MPLAB PICKit On-Board 4 (PKOB4) is a new generation of in-circuit debugger. The MPLAB PKOB4 programs faster than its predecessor and is designed to use a high-speed USB 2.0 interface, providing a feature-rich debugging experience via one USB cable. The MPLAB PKOB4 is intended to support the programming and debugging interface. For more details on the MPLAB PKOB4, refer to the MPLAB Snap In-Circuit Debugger User's Guide (DS50002787).

• Connects to a computer through a Micro-B USB cable
• Programs devices using MPLAB X IDE or MPLAB X IPE
• Supports multiple hardware and software breakpoints, stopwatch and source code file debugging
• Debugs the application in real time
• Sets breakpoints based on internal events
• Monitors internal file registers
• Debugs at full speed
• Configures pin drivers
• Field-upgradeable through an MPLAB X IDE firmware download
• Adds new device support and features by installing the latest version of MPLAB X IDE Note: The MPLAB X IDE is available for free at www.microchip.com/mplab-x-ide.
• Indicates debugger status using on-board LEDs

3.2.1 Recovery Method

When the MPLAB PKOB4 is unresponsive, use the MPLAB X IDE tool to recover the WFI32-IoT board through the following recovery method: 1. Short the pin1 and pin2 of the connector (J301) to the ground for approximately 15 seconds; see the following figure. Note: Ensure that the WFI32-IoT board is turned ON to perform the recovery method. EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 10

Figure 3-3. WFI32-IoT Board (EV36W50A) – Recovery Method Connector (J301) 2. Open the latest version of MPLAB X IDE. 3. The following figure illustrates the opening window of the MPLAB X IDE. From the “Debug” drop-down list, select Hardware Tool Emergency Boot Firmware Recovery. Figure 3-4. MPLAB® X IDE Opening Window 4. Follow the instructions shown in the preceding figure to bring the tool back to factory condition. For additional information on the MPLAB PKOB4, refer to the MPLAB PICkit™ 4 In-Circuit Debugger User's Guide (DS50002751) and MPLAB Snap In-Circuit Debugger User's Guide (DS50002787).

3.3 USB Connectivity

The WFI32E01PC module has an integrated full-speed USB peripheral. This feature enables the user to implement USB functionality through the Micro-AB USB connector (J200) on the WFI32-IoT board. EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 11

3.4 mikroBUS Socket A mikroBUS socket (J402) expands the functionality of the WFI32-IoT board using the MikroElectronika mikroBUS™ Click™ adapter boards. The mikroBUS connector consists of the following:

• Serial Peripheral Interface (SPI)
• Inter-Integrated Circuit (I2C)
• Universal Asynchronous Receiver-Transmitter (UART)
• Reset (GPIO)
• Pulse Width Modulation (PWM)
• Analog and interrupt lines
• 3.3V and 5V power lines Table 3-1. mikroBUS Socket Pinout Details Pin Number Pin on mikroBUS Socket Pin Description of mikroBUS Socket Pin on WFI32E01PC Module(1)

1 AN Analog input AN14/ANN0/CVD14/CVDR14/RPA14/RA14

2 RST Reset ETH_CLK_OUT/CVDT10/RPC12/RC12

3 CS SPI Chip Select CVDT13/ETXD0/RPC15/RC15

4 SCK SPI Clock SCK2/RPA11/RA11

5 MISO SPI Host Input Client Output PTA_WLAN_ACTIVE/RPK5/RK5

6 MOSI SPI Host Input Client Input BT_CLK_OUT/RPK4/RK4

7 +3.3V 3.3V power +3.3V

8 GND Ground GND

9 GND Ground GND

11 SDA I2C Data SDA1/RPA5/RA5

12 SCL I2C Clock SCL1/RPA4/RA4

13 TX UART transmit PTA_BT_ACTIVE/RPK7/RK7

14 RX UART receive TDI/PGD4/AN9/CVD9/CVDR9/RPB9/RB9

15 INT Hardware interrupt ANN1/CVD15/CVDR15/RPA13

16 PWM PWM output ANA0/RPB12/RB12

Notes: 1. For more details on the WFI32E01PC module pins, refer to the PIC32MZ1025W104 MCU and WFI32E01 module with Wi-Fi and Hardware-based Security Accelerator Data Sheet (DS70005425). 2. The SPI interface on the click board can operate up to 12.5 MHz, and the WFI32E01PC module supports up to 20 MHz. 3. To have a fully functional UART click board, the R432 and R435 (default) resistors are populated on the WFI32-IoT board. 4. To have a fully functional CAN click board, populate the R433 and R434 resistors on the WFI32-IoT board. 5. To have a fully functional OLED click board, depopulate the R436 resistor on the WFI32-IoT board. EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 12

3.5 Switches

The following are the available switches on the WFI32-IoT board:

• User-configurable switches – ( SW400) and (SW401)
• Reset switch ( SW402) – Connected with the MCLR signal of the WFI32E01PC module In the Idle state, the level of the user-configurable switch is pulled high (+3.3V) and, when the switch is pressed, it drives the I/O line to low (GND). Table 3-2. Switches Description Switch Name Description Pin on WFI32E01PC Module SW400 User configurable switch2 PGC4/TCK/AN8/CVD8/CVDR8/RPB8 SW401 User configurable switch1 INT0/AN17/CVD17/CVDR17/RPA10 SW402 Reset switch MCLR

3.6 LEDs

The WFI32-IoT on-board LEDs are categorized into three types:

• Power LEDs – Green ( D101) – Charge indicator – Red ( D100) – Low battery indicator – Blue ( D102) – Power indicator
• PKOB4 LEDs – Green ( D300) – ACTIVE indicator – Yellow ( D301) – STATUS indicator
• LEDs related to the WFI32E01PC module: – Red LED ( D400) – Yellow LED ( D401) – Green LED ( D402) – Blue LED ( D403) The following table lists the LEDs that can be turned ON or OFF using the connected GPIO pins. Table 3-3. LEDs Description LED Name Description Pin on WFI32E01PC Module Red LED (D400) User configurable LED1 ERXDV/CVDT14/RPK12 Yellow LED (D401) User configurable LED2 EMDIO/CVDT15/RPK13 Green LED (D402) User configurable LED3 EMDC/CVDT16/RPK14 Blue LED (D403) User configurable LED4 ERXERR/CVDT7/RPC9

3.7 Temperature Sensor

The MCP9808 digital temperature sensor converts temperatures between -20°C and +100°C to a digital word with ±0.25°C/±0.5°C (typical/maximum) accuracy. For more details, refer to the MCP9808 ±0.5°C Maximum Accuracy Digital Temperature Sensor (DS20005095). The following are the additional features of the MCP9808 digital temperature sensor:

• Accuracy EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 13

– ±0.25°C (typical) from -40°C to +125°C – ±0.5°C (maximum) from -20°C to +100°C

• User-Selectable Measurement Resolution – 0.5°C – 0.25°C – 0.125°C – 0.0625°C
• User-Programmable Temperature Limits – Temperature Window Limit – Critical Temperature Limit
• User-Programmable Temperature Alert Output
• Operating Voltage Range – 2.7-5.5V
• Operating Current – 200 μA (typical)
• Shutdown Current – 0.1 μA (typical) The MCP9808 temperature sensor is connected to the WFI32E01PC module through I2C and a GPIO for the user-configurable alert output. Note: 7-bit I2C address – 0x18 Table 3-4. MCP9808 Pin Name Description Pin on WFI32E01PC Module SDA I2C Data SDA1/RPA5 SCL I2C Clock SCL1/RPA4 Alert ASYNC external interrupt TDO/AN7/CVD7/CVDR7/CVDT0/RPB7

3.8 Ambient Light Sensor

A OPT3001 is a sensor that measures the intensity of visible light. The light sensor is mounted on the WFI32-IoT board for measuring the light intensity. Table 3-5. Light Sensor Pin Name Description Pin on WFI32E01PC Module SDA I2C Data SDA1/RPA5 SCL I2C Clock SCL1/RPA4 INT Interrupt output open-drain TMS/AN6/CVD6/CVDR6/CVDT1/RPB6

3.9 Serial Flash

The WFI32-IoT board has an on-board 32-Mbit external SPI Flash (SST26VF032B) memory for the storage of data. For more details on the serial Flash, refer to the SST26VF032B/SST26VF032BA 2.5V/3.0V 32-Mbit Serial Quad I/O™ (SQI™) Flash Memory Data Sheet (DS20005218). The following table describes the details of the serial Flash pin connection. Table 3-6. Serial Flash Pin Description Pin Number Pin on Serial Flash (SST26VF032B) Pin Description of Serial Flash Pin on WFI32E01PC Module(1)

1 CE Chip Enable SPI1CS/RPA1/RA1

2 SO Serial Data Output for SPI mode SDI1/RPC7/RC7

© 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 14

Pin Number Pin on Serial Flash (SST26VF032B) Pin Description of Serial Flash Pin on WFI32E01PC Module(1)

3 WP Write-Protect Not connected

4 VSS Ground GND

5 SI Serial Data Input for SPI mode SDO1/RPC8/RC8

6 SCK Serial Clock SCK1/RPC6/RC6

7 HOLD Hold Not connected

8 VDD Input power supply VDD

Note: 1. For more details on the WFI32E01PC module pins, refer to the PIC32MZ1025W104 MCU and WFI32E01 Module with Wi-Fi and Hardware-based Security Accelerator Data Sheet (DS70005425).

3.10 Secondary Oscillator

The secondary oscillator (Y400) pin has an on-board 32.768-kHz crystal connected to the SOSCO/PK15 and SOSCI/ PB15 pins of the WFI32E01PC module for the RTCC application.

3.11 WFI32E01PC Module

For more details on the WFI32E01PC module pinout details, refer to the PIC32MZ1025W104 MCU and WFI32E01 Module with Wi-Fi and Hardware-based Security Accelerator Data Sheet (DS70005425). Note: The user can configure the Peripheral Pin Select (PPS) pins for any of the supported peripheral functions based on the end user application. EV36W50A Hardware © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 15

1. WFI32-IoT Board Out of Box Demo The WFI32-IoT board’s Out of the Box (OOB) demo is preloaded with a firmware image that enables the user to quickly connect and send data to the AWS cloud using the on-board temperature and light sensors. The users can easily build their own custom projects with software libraries and example codes provided in Harmony v3 framework. The OOB demo connects to the cloud and allows the user to control the WFI32-IoT board via a web-based interface. For more details about the code and documentation related to the OOB demo, go to www.github.com/MicrochipTech/ WFI32-IoT. EV36W50A WFI32-IoT Board Out of Box Demo © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 16

1. Appendix A: Reference Circuit

5.1 WFI32-IoT Board Schematics

Figure 5-1. Power Distribution Switch for PKOB4 GND 10uF 25V 0603 C102 GND GND GNDGNDGND GND MIC2042 VBIAS7 VIN8 VIN12 EN2 /FAULT3 SLEW9 ILIM6 VOUT 10 VOUT 11 VOUT 14 PGREF 13 PWRGD 1UVLOIN4 GND5 U100 24.3k 0402 R106 GND 3V3_PKOB 3V3_PKOB 0.1uF 10V 0402 C101 0.1uF 10V 0402 C104 10k 0402 R101 10k 0402 R107 10k 0402 R102 442k 0402 R104 GND 95.3k 0402 R105 5.62k 0402 R109 5V0 i Power Class 270R 0402 R110 5V0_USBGOOD 5V0_nUSBFLT 0.1uF 10V 0402 C100 22uF 16V 0805 C103 VBUS 10000pF 50V 0402 C105 TP103 3ms slew rate 1.5A output current, R83=CLF/ILIM=395/1.5=263.3ohms (22% tolerance) 4.4V power good threshold, V 4.1V undervoltage in shutdown threshold, VUVTH=0.23*(1+95.3k/5.62k)=4.13V Figure 5-2. Li-Po Battery Connector/Charger 10uF 25V 0603 C106 GND 4.7uF 16V 0603 C108 RED D100 GND 5V0 GND 5V0 GND GND 4.7uF 16V 0603 C107 GND VBAT_OUT 0402 R111 0402 DNP R117 10k 0402 R118 100k 0402 R119 10k 0402 R115 0402 R112 GREEN D101 0402 R113 HDR-2 M ale 1x2 J101 0402 R120 0402 R127 5V0 VBAT_OUT VBAT BLUE D102 4.99k 0402 R114 19 20 TP102 TP104 SEL Pin Low: From USB Port, input current limit governed by USB specs, PROG2= High,ILIMITUSB=500mA SEL Pin High: ILIMITAC = 1.65A PROG1 = 1000V/IREG= 1000/100m=10k, IREG = 100mA PROG3=1000V/ITERMINATION=1000 V/10mA= 100k By default, SEL Pin = Low M CP73871 OUT VPCC SEL PROG2 THERM PG STAT2 STAT1/LBO TE VSS VSS PROG3 PROG1 VBAT VBAT VBAT_SENSE CE IN IN OUT EP U101 EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 17

Figure 5-18. Test Points 1TP406 1TP409 1TP410 USBID/AN2/CVD2/CVDR2/CVDT5/RPB2 VBUSON/CVD1/CVDR1/CVDT6/AN1/RPB1 1TP411 1TP412 1TP413 1TP414 RF_FE_4/RPK1 RF_FE_2/RPK3 PTA_BT_PRIO/RPK6 ERXD1/CVDT8/RPC10 ERXD0/CVDT9/RPC11 Figure 5-19. SPI Memory GND 0.1uF 16V 0603 C419 10k 0603 DNP R423 5% 10k 0603 R420 3V3_IN 3V3_IN SDI1/RPC7 SPI1CS/RPA1 3V3_IN SCK1/RPC6 SDO1/RPC8 10k 0603 DNP R424 3V3_IN TP405

1 TP404

Figure 5-20. MikroBUS Header ETXD0/CVDT13/RPC15 RST CS SCK MISO MOSI +3.3V GND PWM INT RX TX SCL SDA +5V GND AN mikroBUS J402 5V0 GND SCK2/RPA11 BT_CLK_OUT/RPK4 PTA_WLAN_ACTIVE/RPK5 ANA0/RPB12 SCL1/RPA4 SDA1/RPA5 ANN0/CVD14/CVDR14/RPA14 GND GND 3V3_IN 4.7uF 10V 0402 C422 4.7uF 10V 0402 C421 U2TX U2RX ANN1/CVD15/CVDR15/RPA13ETH_CLK_OUT/CVDT10/RPC12 0402 DNP R433 0R 0402 R432 0R 0402 R435 PGD4/TDI/AN9/CVD9/CVDR9/RPB9 PTA_BT_ACTIVE/RPK7 0402 DNP R434 U2RX U2TX U2RX U2TX 0R 0402 R436 EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 24

Figure 5-21. User LEDs 3V3_IN GREEN D402 YELLOW D401 RED D400 BLUE D403 470R 0402 R425 470R 0402 R426 470R 0402 R427 4.99k 1% 0402 R428 ERR DATA CONN WIFI ERXERR/CVDT7/RPC9 EMDIO/CVDT15/RPK13 ERXDV/CVDT14/RPK12 EMDC/CVDT16/RPK14 EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 25

5.2 WFI32-IoT Board Bill of Materials

The following table provides the Bill of Materials (BOM) of the WFI32-IoT board. Table 5-1. WFI32-IoT Board Bill of Materials Designator Description Manufacturer Manufacturer Part Number C100, C101, C104, C202, C204 Capacitor, ceramic, 0.1 uF, 10V, 10%, X5R, SMD, 0402 KEMET C0402C104K8PACTU C102, C106 Capacitor, ceramic, 10 uF, 25V, 20%, X5R, SMD, 0603 Murata Electronics North America, Inc. GRM188R61E106MA73D C103, C405 Capacitor, ceramic, 22 uF, 16V, 10%, X5R, SMD, 0805 TDK Corporation C2012X5R1C226K125AC C105, C207, C211, C212, C218 Capacitor, ceramic, 10000 pF, 50V, 10%, X7R, SMD, 0402, AEC-Q200 Murata Electronics North America, Inc. GCM155R71H103KA55D C107, C108, C109, C112, C113, C115 Capacitor, ceramic, 4.7 uF, 16V, 10%, X5R, SMD, 0603 TDK Corporation C1608X5R1C475K080AC C110, C111, C114, C116, C201, C203, C205, C208, C213, C214, C215, C219, C404, C407, C414, C420, C423 Capacitor, ceramic, 0.1 uF, 16V, 10%, X7R, SMD, 0402 KEMET C0402C104K4RACAUTO C200, C301, C312, C314, C421, C422 Capacitor, ceramic, 4.7 uF, 10V, 10%, X5R, SMD, 0402 TDK Corporation C1005X5R1A475K050BC C206, C216, C217, C220, C221, C224, C225, C226, C227, C228, C229, C230, C302, C303, C304, C305, C306, C307, C308, C309, C310, C313, C315, C316, C317 Capacitor, ceramic, 0.1 µF, 16V, 10%, X5R, SMD, 0201 Murata Electronics North America, Inc. GRM033R61C104KE84D C222, C223 Capacitor, ceramic, 10 uF, 10V, X5R, SMD, 0402 Samsung Electro- Mechanics America, Inc. CL05A106MP8NUB8 C300 Capacitor, ceramic, 10 pF, 25V, 0.5 pF, C0G, SMD, 0201 TDK Corporation C0603C0G1E100D030BA C311, C408, C409 Capacitor, ceramic, 10000 pF, 16V, 10%, X7R, SMD, 0402 KEMET C0402C103K4RACTU C400, C401 Capacitor, ceramic,12 pF, 50V, 1%, NP0, SMD, 0402 Murata Electronics North America, Inc. GRM1555C1H120FA01D C419 Capacitor, ceramic, 0.1 uF, 16V, 10%, X7R, SMD, 0603 KEMET C0603X104K4RACTU D100, D400 Diode, LED, Red, 2V, 30 mA, 2 mcd, Clear, SMD, 0603 Lite-On , Inc. LTST-C190EKT D101, D300, D402 Diode, LED, Green, 2V, 30 mA, 35 mcd, Clear, SMD, 0603 Lite-On , Inc. LTST-C191KGKT EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 26

Designator Description Manufacturer Manufacturer Part Number D102, D403 Diode, LED, Blue, 3.2V, 20 mA, 140 mcd, Clear, SMD, 0603 Dialight Corporation 598-8091-107F D301, D401 Diode, LED, Yellow, 2.1V, 20 mA, 6 mcd, Clear, SMD, 0603 Lite-On , Inc. LTST-C190YKT FB200 Ferrite, 2A, 220R, SMD, 0805 Murata Electronics North America, Inc. BLM21PG221SN1D FB300, FB301 Ferrite, 2A, 600R, SMD, 0805 TDK Corporation MPZ2012S601AT000 FB400, FB401 Ferrite, 120R at 100 MHz, 0.55A, 0.19R, SMD, 0402 Murata Electronics BLM15AG121SN1D J101 Connector, HDR-2 Male, 1x2, Shroud,

3.3 MH, TH, R/A

Inc. S2B-PH-K-S(LF)(SN) J200 Connector, USB 2.0, Micro-B, Female, TH/SMD, R/A FCI 10118194-0001LF J301 Connector, Hardware, 1.27 mm, T/H AU 2POS Harwin Plc. M50-3530242 J400 Connector, Hardware, -2.54 Male, 1x2, Gold, 5.84 MH, TH, vertical FCI 77311-118-02LF J402 mikroBUS Host Sullins Connector Solutions PPTC081LFBN-RC LABEL100 Label, PCBA, 18x6 mm, Data matrix, Assy#/Rev/ Serial/Date ACT Logimark AS 505462 Q200 Transistor, FET, P-Channel, IRLML6402 -20V, -3.7A, 1.3W, SOT-23-3 International Rectifier IRLML6402TRPBF R100, R130 Resistor, TF, 0R, jumper, 1/8W, SMD, 0805 Yageo Corporation Corporation RC0805JR-070RP R102, R107, R115, R118, R132, R133, R200, R237 Resistor, TKF, 10k, 5%, 1/16W, SMD, 0402 Vishay/Dale CRCW040210K0JNED R103 Resistor, TKF, 31.6k, 1%, 1/10W, SMD, 0402 Panasonic ERJ-2RKF3162X R104 Resistor, TKF, 442K, 1%, 1/16W, AEC- Q200, SMD, 0402 Stackpole Electronics Inc RMCF0402FT442K R105 Resistor, TKF, 95.3K, 1%, 1/16W, AEC- Q200 SMD, 0402 Stackpole Electronics, Inc. RMCF0402FT95K3 R106 Resistor, TKF, 24.3k, 1%, 1/16W, SMD, 0402 Samsung Electro- Mechanics America, Inc. RC1005F2432CS R108 Resistor, TKF, 47k, 1%, 1/10W, SMD, 0402 Panasonic - ECG ERJ-2RKF4702X R109, R302 Resistor, TKF, 5.62k, 1%, 1/16W, SMD, 0402 Vishay/Dale CRCW04025K62FKED EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 27

Designator Description Manufacturer Manufacturer Part Number R110 Resistor, TKF, 270R, 1%, 1/10W, SMD, 0402 Panasonic Electronic Components ERJ-2RKF2700X R111, R120, R127, R206, R234, R236, R408, R409, R410, R431, R432, R435, R436, R437, R438 Resistor, TKF0R, 1/16W, SMD, 0402 Yageo Corporation RC0402JR-070RL R112, R113, R306 Resistor, TKF, 1k, 5%, 1/16W, SMD, 0402 Yageo Corporation RC0402JR-071KL R114, R428 Resistor, TKF, 4.99k, 1%, 1/16W, SMD, 0402 Stackpole Electronics Inc. RMCF0402FT4K99 R116 Resistor, TKF, 100R, 1%, 1/10W, SMD, 0603 Stackpole Electronics Inc RMCF0603FT100R R119, R201, R210, R233, R303, R304, R305, R405, R406 Resistor, TKF, 100k, 5%, 1/10W, SMD, 0402 Panasonic ERJ-2GEJ104X R121, R214, R215, R218, R222, R223, R300, R301 Resistor, TKF, 4.7k, 1%, 1/16W, SMD, 0402 Yageo Corporation RC0402FR-074K7L R122, R128 Resistor, TKF, 147k, 1%, 1/10W, SMD, 0603 Panasonic ERJ-3EKF1473V R123, R126 Resistor, TKF, 200k, 1%, 1/10W, SMD, 0402 Panasonic ERJ-2RKF2003X R125, R129 Resistor, TKF, 20k, 1%, 1/10W, SMD, 0603 Panasonic ERJ-3EKF2002V R131 Resistor, TF, 2.2R, 1%, 1/2W, SMD, 1206 Susumu Co., LTD. RL1632R-2R20-F R202, R207 Resistor, TKF, 47k, 5%, 1/10W, SMD, 0402 Panasonic ERJ-2GEJ473X R209 Resistor, TKF, 12k, 1%, 1/16W, SMD, 0402 Yageo Corporation RC0402FR-0712KL R211, R219, R225, R226, R229, R230 Resistor, TKF, 22R, 1%, 1/16W, SMD, 0402 Yageo Corporation RC0402FR-0722RL R212, R213, R220, R221 Resistor, TKF, 330R, 1%, 1/16W, SMD, 0402 Yageo Corporation RC0402FR-07330RL R216, R224 Resistor, TKF, 3.3k, 1%, 1/10W, SMD, 0402 Panasonic - ECG ERJ-2RKF3301X R217 Resistor, TKF, 100R, 1%, 1/16W, SMD, 0402 Yageo Corporation RC0402FR-07100RL R307, R425, R426, R427 Resistor, TKF, 470R, 5%, 1/16W, SMD, 0402 Yageo Corporation RC0402JR-07470RL R404, R412 Resistor, TKF, 10k, 1%, 1/10W, SMD, 0402 Panasonic ERJ-2RKF1002X EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 28

Designator Description Manufacturer Manufacturer Part Number R407 Resistor, TKF, 1k, 1%, 1/10W, SMD, 0402 Panasonic ERJ-2RKF1001X R413, R414 Resistor, TKF, 1.5k, 5%, 1/16W, SMD, 0402 ROHM Semiconductor MCR01MRTJ152 R417, R418 Resistor, TKF, 200R, 1%, 1/10W, SMD, 0402 Panasonic ERJ-2RKF2000X R419 Resistor, TF, 100k, 1%, 1/8W, SMD, 0603 Vishay Beyschlag MCT06030C1003FP500 R420 Resistor, TKF, 10k, 5%, 1/10W, SMD, 0603 Panasonic ERJ-3GEYJ103V SW400, SW401, SW402 Switch, Tactile, SPST-NO, 32V, 0.05A, KMR221GLFS C&K Components KMR221GLFS U200 IC, Filter, EMI2121MTTAG, Common mode, ESD, WDFN-8 ON Semiconductor EMI2121MTTAG U203, U204, U205, U206 IC, Voltage translator, Bidirectional,

1 Circuit, 74LVC1T45FW4-7, X2-

U401 IC, Ambient light sensor, 6USON Texas Instruments OPT3001DNPT X200 Resonator, 12 MHz, 0.2%, SMD, CSTNE12M0G550000R0 Murata Electronics CSTNE12M0G550000R0 Y400 Crystal, 32.768 KHz, 12.5 pF, SMD, 2- SMD, No Lead Epson FC-12M32.7680KA-A5 Q100, Q201, Q202 Microchip, Analog, Mosfet, N-Channel, TN2106, 60V, 280 mA, 360 mW, 2.5R, SOT23-3 Microchip Technology Inc. TN2106K1-G U100 Microchip, Analog power switch, 5.5V, 3A, MIC2042-1YTS, TSSOP-14 Microchip Technology Inc. MIC2042-1YTS U101 Microchip, Analog battery charger, MCP73871-2CCI/ML, QFN-20 Microchip Technology Inc. MCP73871-2CCI/ML U102, U104 Microchip, Analog, LDO, 0.8V-5V, MCP1727T-ADJE/MFDFN-8 Microchip Technology Inc. MCP1727T-ADJE/MF U201 Microchip, Interface, USB 2.0, HS, HUB, CTRLRUSB2514B-I/M2, SQFN-36 Microchip Technology Inc. USB2514B-I/M2 U202 Microchip, Interface, USB, UART, MCP, 2200, I/MQQFN-20 Microchip Technology Inc. MCP2200-I/MQ U300 Microchip, MCU, 32-bit, 300 MHz, 2 MB, 384K x 8, ATSAME70N21B-CNT, TFBGA-100 Microchip Technology Inc. ATSAME70N21B-CNT U301 Microchip, Memory serial, EEPROM, 256k, I2C, 24LC256T-E/ST, TSSOP-8 Microchip Technology Inc. 24LC256T-E/ST U400 MOD, Wi-Fi, WFI32E01PCI Microchip Technology Inc. WFI32E01PCI EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 29

Designator Description Manufacturer Manufacturer Part Number U402 Microchip, Analog, Temperature sensor, -40C to +125C, MCP9808T- E/MC, DFN-8 Microchip Technology Inc. MCP9808T-E/MC U403 Microchip, Memory serial Flash, SST26VF032B-104I/SM, SOIJ-8 Microchip Technology Inc. SST26VF032B-104I/SM Y200 Microchip, CMOS oscillator, 24 MHz, DSC6011HI1B-024.0000, SMD, VFLGA-4 Microchip Technology Inc. DSC6011HI1B-024.0000 Y300 Microchip, Clock oscillator, single, 12.000 MHz, DSC6011JI1B-012.0000, VLGA Microchip Technology Inc. DSC6011JI1B-012.0000 CBL100 Mechanical, hardware, cable USB, Male-A to Male Micro-B, Clear, 4’ Dongguan Zhanxin Electronic Technology Co., Ltd A006ZX027 JP401 Mechanical, hardware, jumper, 2.54 mm, 1x2, Gold Wurth Elektronik 60900213421 NUT100, NUT101, NUT102, NUT103 Mechanical, hardware, Nut, M3, Nylon Keystone Electronics Corp. 4688 STANDOFF100, STANDOFF101, STANDOFF102, STANDOFF103 Mechanical, hardware, Stand-off, M, 3x10 mm, M/F, Thread, 6 mm Hex, 5.5 mm Nylon Duratool™ D01496 EV36W50A Appendix A: Reference Circuit © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 30

1. Appendix: B Regulatory Approval This equipment (WFI32-IoT Board/EV36W50A) is an evaluation kit and not a finished product. It is intended for laboratory evaluation purposes only. It is not directly marketed or sold to the general public through retail; it is only sold through authorized distributors or through Microchip. Using this requires a significant engineering expertise towards understanding of the tools and relevant technology, which can be expected only from a person who is professionally trained in the technology. Regulatory compliance settings have to follow the WFI32E01PC module certifications. The following regulatory notices are to cover the requirements under the regulatory approval.

6.1 United States

The WFI32-IoT Board (EV36W50A) contains the WFI32E01PC module, which has received Federal Communications Commission (FCC) CFR47 Telecommunications, Part 15 Subpart C “Intentional Radiators” single-modular approval in accordance with Part 15.212 Modular Transmitter approval. Contains FCC ID: 2ADHKWFI32E01 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Important: FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for uncontrolled environment. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 8 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. This transmitter is restricted for use with the specific antenna(s) tested in this application for certification. CAUTIONAny changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

6.2 Canada

The WFI32-IoT Board (EV36W50A) contains the WFI32E01PC module, which has been certified for use in Canada under Innovation, Science and Economic Development Canada (ISED, formerly Industry Canada) Radio Standards Procedure (RSP) RSP-100, Radio Standards Specification (RSS) RSS-Gen and RSS-247. EV36W50A Appendix: B Regulatory Approval © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 31

Contains IC: 20266-WFI32E01 This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s license-exempt RSS(s). Operation is subject to the following two conditions: 1. This device may not cause interference; 2. This device must accept any interference, including interference that may cause undesired operation of the device. L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: 1. L’appareil ne doit pas produire de brouillage; 2. L’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement. WARNINGThis equipment complies with radio frequency exposure limits set forth by Innovation, Science and Economic Development Canada for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the device and the user or bystanders. Cet équipement est conforme aux limites d'exposition aux radiofréquences définies par d’Innovation, Sciences et Développement économique Canada pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre le dispositif et l'utilisateur ou des tiers.

6.3 Europe

This equipment (EV36W50A) has been assessed under the Radio Equipment Directive (RED) for use in European Union countries. The product does not exceed the specified power ratings, antenna specifications and/or installation requirements as specified in the user manual. A Declaration of Conformity is issued for each of these standards and kept on file as described in Radio Equipment Directive (RED). Simplified EU Declaration of Conformity Hereby, Microchip Technology Inc. declares that the radio equipment type [EV36W50A] is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at www.microchip.com/en-us/development-tool/ EV36W50A (See Conformity Documents). EV36W50A Appendix: B Regulatory Approval © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 32

1. Document Revision History Revision Date Section Description A 02/2022 Document Initial Revision EV36W50A Document Revision History © 2022 Microchip Technology Inc. and its subsidiaries User Guide DS50003262A-page 33

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