8595A-2AGQN4NNN

u-blox AG

LTE Cat M1 / NB1 and EGPRS modules

Manufacturer: u-blox AG

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PDF pages: 43

Technical content

Datasheet sections

1 Functional description
1.1 Overview
1.2 Product features
1.3 Block diagram
1.4 Product description
1.5 AT command support
1.6 Supported features
2 Interfaces
2.1 Power management
2.1.1 Module supply input (VCC)
2.1.2 Generic digital interfaces supply output (V_INT)
2.2 Antenna interface
2.2.1 Antenna RF interface (ANT)
2.2.2 Antenna detection (ANT_DET)
2.3 System functions
2.3.1 Module power-on
2.3.2 Module power-off
2.3.3 Module reset
2.4 SIM
2.4.1 SIM interface
2.4.2 SIM detection
2.5 Serial communication
2.5.1 UART interface
2.5.2 USB interface
2.5.3 SPI interface
2.5.4 SDIO interface
2.5.5 DDC (I2C) interface
2.6 Audio
2.7 GPIO
3 Pin definition
3.1 Pin assignment
4 Electrical specifications
4.1 Absolute maximum rating
4.1.1 Maximum ESD
4.2 Operating conditions
4.2.1 Operating temperature range
4.2.2 Thermal parameters
4.2.3 Supply/power pins

LTE Cat M1 / NB1 and EGPRS modules Data sheet Abstract Technical data sheet describing the size -optimized SARA-R4 series LTE Cat M1 / NB1 and EGPRS cellular modules. The modules are a complete and cost efficient solution offering multi band data transmissions for Low Power Wide Area solutions in a compact form factor. www.u-blox.com UBX-16024152 - R18 SARA-R4

SARA-R4 series - Data sheet UBX-16024152 - R18 Page 2 of 43 Document information Title SARA-R4 series Subtitle LTE Cat M1 / NB1 and EGPRS modules Document type Data sheet Document number UBX-16024152 Revision and date R18 20-Dec-2019 Disclosure restriction Product status Corresponding content status Functional sample Draft For functional testing. Revised and supplementary data will be published later. In development / Prototype Objective specification Target values. Revised and supplementary data will be published later. Engineering sample Advance information Data based on early testing. Revised and supplementary data will be published later. Initial production Early production information Data from product verification. Revised and supplementary data may be published later. Mass production / End of life Production information Document contains the final product specification. This document applies to the following products: Product name Type number Modem version Application version PCN reference Product status SARA-R410M-63B-00 L0.08.12 A.01.09 UBX-19047631 Engineering sample SARA-R410M-73B-00 L0.08.08 A01.06 UBX-19040180 Prototype SARA-R412M SARA-R412M-02B-00 M0.09.00 A02.11 UBX-19004091 Obsolete SARA-R412M-02B-01 M0.10.00 A02.14 UBX-19016568 Initial production 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.

SARA-R4 series - Data sheet UBX-16024152 - R18 Page 4 of 43

SARA-R4 series - Data sheet UBX-16024152 - R18 Functional description Page 5 of 43

1 Functional description

1.1 Overview

SARA-R4 series modules are an LTE Cat M1, LTE Cat NB1 and EGPRS multi-mode solution in the miniature SARA LGA form factor (26.0 x 16.0 mm, 96-pin). They allow an easy integration into compact designs and a seamless drop-in migration from other u-blox cellular module families. SARA-R4 series modules provide software -based multi -band configurability enabling international multi-regional coverage in LTE Cat M1 / NB1 and (E)GPRS radio access technologies. SARA-R4 series modules offer data communications up to 375 kb/s over an extended operating temperature range of –40 °C to +85 °C, with low power consumption, and with coverage enhancement for deeper range into buildings and basements (and underground with NB1). With many interface options and an integrated IP stack, SARA-R4 series modules are the optimal choice for LPWA applications with low to medium data throughput rates, as well as devices that require long battery lifetimes, such as used in smart metering, smart lighting, telematics, asset tracking, remote monitoring, alarm panels, and connected health. Customers can future -proof their solutions by means of Over -The-Air firmware updates, thanks to the uFOTA client/server solution that utilizes LWM2M, a light and compact protocol ideal for IoT. SARA-R4 series modules will also support VoLTE over Cat M1. The flexibility extends further through dynamic mode selection as M1-only/preferred or NB1-only/preferred.

1.2 Product features

Product variant Region Bands Positioning Interfaces Audio Features Grade 3GPP Release Baseline 3GPP LTE category LTE FDD bands (E)GPRS 4-band GNSS via modem AssistNow software CellLocate® UART USB 2.0 SPI SDIO DDC (I2C) GPIOs Analog audio Digital audio Power Saving Mode eDRX Antenna supervisor Embedded TCP/UDP Embedded HTTP, FTP Dual stack IPv4/IPv6 FOTA Standard Professional Automotive SARA-R410M-01B North America 13 M1 2,4 SARA-R410M-02B Multi Region 13 M1 SARA-R410M-52B North America 13 M1 2,4,5 SARA-R412M-02B Multi Region 13 M1 * = Bands may include 1, 2, 3, 4, 5, 8, 12, 13, 18, 19, 20, 25, 26, 28 ● = supported by all FW versions ○ = supported by future FW versions Table 1: SARA-R4 series main features summary 1 1 See Table 29 for the model / marketing name of each product variant, as identified by various certification bodies.

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1.3 Block diagram

V_INT RF transceiver Cellular BaseBand Processor ANT VCC (Supply) USB DDC (I2C) SIM card detection SIM UART Power-on Reset GPIOs Antenna detection Switch PA

19.2 MHz

Figure 1: SARA-R4 series block diagram ☞ SARA-R404M-00B and SARA -R410M-01B modules, i.e. the “00” and “01” product versions of the SARA-R4 series modules, do not support the following interfaces, which should be left unconnected and should not be driven by external devices: o DDC (I2C) interface o SDIO interface o SPI interface o Digital audio interface ☞ SARA-R410M-02B, SARA-R410M-52B, SARA-R410M-63B, SARA-R410M-73B, SARA-R412M-02B, SARA-N410-02B modules, i.e. the “02” , “52”, “63”, “73” product version s of the SARA-R4 series modules, do not support the following interfaces, which should be left unconnected and should not be driven by external devices: o SDIO interface o SPI interface o Digital audio interface

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1.4 Product description

SARA-R4 series modules include the following variants / product versions:  SARA-R404M LTE Cat M1 module, mainly designed for operation in LTE band 13  SARA-R410M-01B LTE Cat M1 module, mainly designed for operation in LTE bands 2, 4, 5, 12  SARA-R410M-02B LTE Cat M1 / NB1 module, mainly designed for operation in LTE bands 2, 3, 4, 5, 8, 12, 13, 20, 25, 28  SARA-R410M-52B LTE Cat M1 module, mainly designed for operation in LTE bands 2, 4, 5, 12, 13  SARA-R410M-63B LTE Cat M1 module, mainly designed for operation in LTE bands 1, 8, 19  SARA-R410M-73B LTE Cat M1 module, mainly designed for operation in LTE bands 3, 5, 26  SARA-R412M-02B LTE Cat M1 / NB1 and 2G module, mainly designed for operation in LTE bands 2, 3, 4, 5, 8, 12, 13, 20 and 2G Quad -band  SARA-N410-02B LTE Cat NB1 module, mainly designed for operation in LTE bands 2, 3, 4, 5, 8, 12, 13, 28 Table 2 summarizes cellular radio access technologies characteristics and features supported by the SARA-R4 series modules. ☞ See Table 28 for the detailed list of RATs and bands included in each certification approval of the SARA-R4 series modules product versions.

SARA-R4 series - Data sheet UBX-16024152 - R18 Functional description Page 8 of 43 Item SARA-R404M SARA-R410M SARA-R412M SARA-N410 Protocol stack 3GPP Release 13 3GPP Release 13 3GPP Release 13 3GPP Release 13 RAT LTE Cat M1 Half-Duplex LTE Cat M1 Half-Duplex LTE Cat NB1 Half-Duplex 2, 4, 5, 7 LTE Cat M1 Half-Duplex LTE Cat NB1 Half-Duplex 2G GPRS / EGPRS LTE Cat NB1 Half-Duplex LTE FDD bands Band 13 (750 MHz) Band 1 (2100 MHz) 2, 5 Band 2 (1900 MHz) 7 Band 3 (1800 MHz) 2, 5 Band 4 (1700 MHz) 7 Band 5 (850 MHz) Band 8 (900 MHz) 2, 5 Band 12 (700 MHz) 7 Band 13 (750 MHz) 2, 7 Band 18 (850 MHz) 2, 4, 5, 7 Band 19 (850 MHz) 2, 4, 5 Band 20 (800 MHz) 2, 5, 7 Band 25 (1900 MHz) 2, 3, 4, 5, 6, 7 Band 26 (850 MHz) 2, 4, 5 Band 28 (700 MHz) 2, 5, 7 Band 2 (1900 MHz) Band 3 (1800 MHz) Band 4 (1700 MHz) Band 5 (850 MHz) Band 8 (900 MHz) Band 12 (700 MHz) Band 13 (750 MHz) Band 20 (800 MHz) Band 26 (850 MHz) 8 Band 28 (700 MHz) 8 Band 2 (1900 MHz) Band 3 (1800 MHz) Band 4 (1700 MHz) Band 5 (850 MHz) Band 8 (900 MHz) Band 12 (700 MHz) Band 13 (750 MHz) Band 20 (800 MHz) Band 28 (700 MHz) 2G bands GSM 850 MHz E-GSM 900 MHz DCS 1800 MHz PCS 1900 MHz Power class LTE Cat M1: Class 3 (23 dBm) LTE Cat M1 / NB19: Class 3 (23 dBm) LTE category M1 / NB1: Class 3 (23 dBm) 2G GMSK: Class 4 (33 dBm) for GSM/E-GSM bands Class 1 (30 dBm) for DCS/PCS bands 2G 8-PSK: Class E2 (27 dBm) for GSM/E-GSM bands Class E2 (26 dBm) for DCS/PCS bands LTE category NB1: Class 3 (23 dBm) Data rate LTE category M1: up to 375 kb/s UL up to 300 kb/s DL LTE category M1: up to 375 kb/s UL up to 300 kb/s DL LTE category NB19: up to 62.5 kb/s UL up to 27.2 kb/s DL LTE category M1: up to 375 kb/s UL up to 300 kb/s DL LTE category NB1: up to 62.5 kb/s UL up to 27.2 kb/s DL GPRS multi-slot class 3310: Up to 85.6 kb/s UL Up to 107 kb/s DL EGPRS multi-slot class 3310: Up to 236.8 kb/s UL Up to 296.0 kb/s DL LTE category NB1: up to 62.5 kb/s UL up to 27.2 kb/s DL Table 2: SARA-R4 series LTE Cat M1, LTE Cat NB1, EGPRS and GPRS characteristics 2 Not supported by the SARA-R410M-01B product version. 3 Not supported by the SARA-R410M-02B-00 product version. 4 Not supported by the SARA-R410M-52B-00 product version. 5 Not supported by the SARA-R410M-52B-01 product version. 6 Not supported in LTE Cat NB1 by the SARA-R410M-02B-01 product version. 7 Not supported by the SARA-R410M-63B and SARA-R410M-73B product version. 8 Not supported by the SARA-R412M-02B-00 product version. 9 LTE Cat NB1 not supported by SARA-R410M-01B, SARA-R410M-52B, SARA-R410M-63B, SARA-R410M-73B product versions. 10 GPRS/EGPRS multi-slot class 33 implies a maximum of 5 slots in Down-Link and 4 slots in Up-Link with 6 slots in total.

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1.5 AT command support

The SARA-R4 series modules support AT commands according to the 3GPP standards TS 27.007 [4], TS 27.005 [6], TS 27.010 [7], and the u-blox AT command extension. ☞ For the complete list of all supported AT commands and their syntax, see the SARA-R4 series AT commands manual [1].

1.6 Supported features

Table 3 lists some of the main features supported by SARA-R4 series modules. For more details, see the SARA-R4 series system integration manual [2] and the SARA-R4 series AT commands manual [1]. Feature Description Network indication GPIO configured to indicate the network status: registered home network, registered roaming, data call enabled, no service. The feature can be enabled through the +UGPIOC AT command. Antenna detection The ANT_DET pin provides antenna presence detection capability, evaluating the resistance from the ANT pin to GND by means of an external antenna detection circuit implemented on the application board. The antenna supervisor (i.e. antenna detection) feature can be enabled through the +UANTR AT command. Embedded TCP and UDP stack Embedded TCP/IP and UDP/IP stack including direct link mode for TCP and UDP sockets. Sockets can be set in Direct Link mode to establish a transparent end-to-end communication with an already connected TCP or UDP socket via the serial interface. FTP File Transfer Protocol functionality is supported via AT commands. HTTP Hyper-Text Transfer Protocol functionality is supported via AT commands. Embedded SSL/TLS 11 With the support of X.509 certificates, embedded SSL/TLS provides server and client authentication, data encryption, data signature and enables TCP/IP applications to communicate over a secured and trusted connection. The feature can be configured and enabled by the +USECMNG and +USECPRF AT commands. Device and data security 12 Device security: authentication, updates Data security: PSK, E2E encryption, local encryption For more details, see the security suite application note [4] MQTT 13 Message Queuing Telemetry Transport is an ISO standard publish-subscribe messaging protocol designed for lightweight M2M communications over TCP. MQTT allows clients to communicate one-to-one, one-to-many and many-to-one over a long-lived outgoing TCP connection. BIP 13 Bearer Independent Protocol for Over-the-Air SIM provisioning. Dual stack IPv4/IPv6 Capability to move between IPv4 and dual stack network infrastructures. IPv4 and IPv6 addresses can be used. MNO profiles 13 Mobile network operator profiles provide with a powerful and flexible method to configure the SARA-R4 series modules to seamlessly work with the selected mobile network operator. Using the MNO profiles the device is dynamically configured to use the proper bands, RATs, power saving parameters, e-DRX parameters and the protocol stack settings needed to operate on the selected network in full compliance with operator requirements. Use the +UMNOPROF AT command to select a profile for the network operator. Firmware update Over AT commands (FOAT) Firmware module update over AT command interface. The feature can be enabled and configured through the +UFWUPD AT command. Firmware update Over The Air (uFOTA) u-blox firmware module update over the LTE air interface client/server solution using LWM2M.

11 Not supported by “00” product version

12 Not supported by “00”, “01”, “02” and “52” product versions

13 Not supported by “00” and “01” product versions

SARA-R4 series - Data sheet UBX-16024152 - R18 Functional description Page 10 of 43 Feature Description GNSS via modem 14 Full access to u-blox positioning chips and modules is available through DDC (I2C) interface. This means that from any host processor, a single serial port can control the SARA-R4 series cellular module and the u-blox positioning chip or module. CellLocate 15 Enables the estimation of device position based on the parameters of the mobile network cells visible to the specific device based on the CellLocate® database. CellLocate® is available via a set of AT commands for CellLocate® service configuration and position request. Power Saving Mode (PSM) The Power Saving Mode (PSM) feature, defined in 3GPP Rel.13, allows further reduction of the module current consumption maximizing the amount of time a device can remain in PSM low power deep sleep mode during periods of data inactivity. It can be activated and configured by the +CPSMS AT command. e-I-DRX 16 Extended Idle mode DRX, based on 3GPP Rel.13, reduces the amount of signaling overhead decreasing the frequency of scheduled measurements and/or transmissions performed by the module in idle mode. This in turn leads to a reduction in the module power consumption while maintaining a perpetual connection with the base station. Coverage Enhancements Mode A Coverage Enhancements (CE) Mode A, introduced in 3GPP Rel.13, is used to improve cell signal penetration. Coverage Enhancements Mode B 17 Coverage Enhancements (CE) Mode B, introduced in 3GPP Rel.13, is used to further improve cell signal penetration. Connected Mode Mobility 18 LTE Cat M1 Connected Mode Mobility (CMM) with CE Mode A Release Assistance Indicator 18 The 3GPP Release Assistance feature allows the module to request for the RRC connection to be dropped as soon as the message has been received by the network. This feature allows a reduction in the module power consumption. LWM2M with dynamically loaded objects 18 Method allowing dynamically loaded run time objects for customers to configure u-blox modules to define necessary objects, create instances of those objects as appropriate, manage module LWM2M protocol stack to interact with the LWM2M server. Table 3: Some of the main features supported by SARA-R4 series modules ☞ u-blox is extremely mindful of user privacy. When a pos ition is sent to the CellLocate ® server, u-blox is unable to track the SIM used or the specific device.

14 Not supported by “00” and “01” product versions

15 Not supported by “00”, “01”, “02” and “52” product versions

16 The feature is disabled on “00” and “01” product versions due to network readiness

17 Not supported by “00”, “01”, “02”, “52”, “63” and “73” product versions

18 Not supported by “00”, “01”, “02” and “52” product versions

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2 Interfaces

2.1 Power management

2.1.1 Module supply input (VCC)

SARA-R4 series modules must be supplied through the VCC pins by a DC power supply. Voltage must be stable, because during operation the current drawn from VCC may vary significantly, based on the power consumption profile of the LTE Cat M1, LTE Cat NB1 and the 2G radio access technologies (described in the SARA-R4 series system integration manual [2]). SARA-R412M modules provide separate supply inputs over the three VCC pins:  VCC pins #52 and #53 represent the supply input for the internal RF Power Amplifier, demanding most of the total current drawn of the module when RF transmission is enabled during a call  VCC pin #51 represents the supply input for the internal baseband Power Managemen t Unit, demanding minor part of the total current drawn of the module when RF transmission is enabled during a call The three VCC pins of SARA-R404M, SARA-R410M and SARA-N410 modules are internally connected to both the internal Power Amplifier and the internal baseband Power Management Unit. It is important that the system power supply circuit is able to withstand the maximum pulse current during a transmit burst at maximum power level (see Table 12).

2.1.2 Generic digital interfaces supply output (V_INT)

SARA-R4 series modules provide a 1.8 V supply rail output on the V_INT pin, which is internally generated when the module is switched on. The same voltage domain is used internally to supply the generic digital interfaces of the module. The V_INT supply output can be used in place of an external discrete regulator.

2.2 Antenna interface

2.2.1 Antenna RF interface (ANT)

The ANT pin represents the RF antenna interface of the module, with a characteristic impedance of 50 .

2.2.2 Antenna detection (ANT_DET)

The ANT_DET pin is an Analog to Digital Converter (ADC) input with a current source provided by SARA-R4 series modules to sense the antenna presence (as an optional feature). It evaluates the resistance from the ANT pin to GND by means of an external antenna detection circuit implemented on the application board (for more detail s, see the u -blox SARA-R4 series system integration manual [2] and the SARA-R4 series AT commands manual [1]).

2.3 System functions

2.3.1 Module power-on

SARA-R4 series can be switched on using the following procedure:  Low level on the PWR_ON pin, which is normally set high by an internal pull -up, for a valid time period when the applied VCC voltage is within the valid operating range (see sections 4.2.3 and 4.2.8). The PWR_ON line has to be driven by open drain, open collector or contact switch.

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2.3.2 Module power-off

SARA-R4 series can be properly switched off, with storage of the current parameter settings and a clean network detach, in one of these ways:  AT+CPWROFF command (see the SARA-R4 series AT commands manual [1])  Low pulse on the PWR_ON pin for a valid time period (see section 4.2.8) An abrupt shutdown occurs on SARA-R4 series modules, without storage of the current parameter settings and without a clean network detach, when:  the VCC supply drops below the extended operating range minimum limit  a low level is applied on the RESET_N pin, which is normally set high by an internal pull -up, for a valid time period (see section 4.2.9). RESET_N line has to be driven by open drain, open collector or contact switch.

2.3.3 Module reset

SARA-R4 series modules can be reset (re-booted) by:  AT+CFUN command (see the SARA-R4 series AT commands manual [1]). This causes an “internal” or “software” reset of the module. The current parameter settings are saved in the module’s non - volatile memory and a clean network detach is performed.

2.4 SIM

2.4.1 SIM interface

A SIM card interface is provided on VSIM, SIM_IO, SIM_CLK, SIM_RST pins: the high-speed SIM/ME interface is implemented as well as the automatic detection of the required SIM supporting voltage. Both 1.8 V and 3 V SIM types are supported (1.8 V and 3 V). Activation and deactivation with an automatic voltage switch from 1.8 V to 3 V is implemented according to the ISO -IEC 7816 -3 specifications. The SIM driver supports the PPS procedure for baud -rate selection, according to the values proposed by the SIM card/chip.

2.4.2 SIM detection

The GPIO5 pin of SARA-R4 series modules is a 1.8 V digital input whi ch can be configured as an external interrupt to detect the SIM card presence , as intended to be properly connected to the mechanical switch of an external SIM card holder. For more details, see the SARA-R4 series system integration manual [2] and the SARA-R4 series AT commands manual [1].

2.5 Serial communication

The SARA-R4 series provides the following serial communication interfaces:  UART interface: asynchronous serial interface availa ble for the communication with a DTE host application processor (AT commands, data communication, FW update by means of FOAT)  USB interface: High-Speed USB 2.0 compliant interface available for communications with a USB host application processor (AT comm ands, data communication, FW update by means of the FOAT feature), for FW update by means of the u-blox tool and for diagnostics  SPI interface: Serial Peripheral Interface available for communications with an external compatible device  SDIO inte rface: Secure Digital Input Output interface available for communications with a compatible device  DDC interface: I2C bus compatible interface available for communications with external I2C devices

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2.5.1 UART interface

SARA-R4 series modules include a 9 -wire unbalanced asynchronous serial interface (UART) for communication with an application host processor (AT commands and data communication). ☞ The UART is available only if the USB is not enabled as AT command / data comm unication interface: UART and USB cannot be concurrently used for this purpose. UART features are:  Complete serial port with RS -232 functionality conforming to ITU -T V.24 recommendation [10], with CMOS compatible signal levels (0 V for low data bit or ON state and 1.8 V for high data bit or OFF state)  Data lines ( RXD as output, TXD as input), hardware flow control lines ( CTS as output, RTS as input), modem status and control lines (DTR as input, DSR as output, DCD as output, RI as output) are provided  The default baud rate is 115’200 b/s  The default frame format is 8N1 (8 data bits, no parity, 1 stop bit) ☞ Hardware flow control is not supported by the “00”, “01” and SARA -R410M-02B product versions, but the RTS input line needs to be set low (= ON state) to communicate over the UART interface on the “00” and “01” product versions. The UART serial interface can be conveniently configured through AT commands. For more details, see the SARA-R4 series AT commands manual [1] and the SARA-R4 series system integration manual [2].

2.5.1.1 Multiplexer protocol

SARA-R4 series modules include multiplexer functionality as per 3GPP TS 27.010 [7] on the UART physical link. This is a data link protocol which uses HDLC-like framing and operates between the module (DCE) and the application processor (DTE), allowing a number of simultaneous sessions over the physical link (UART). The following virtual channels are defined:  Channel 0: for multiplexer control  Channel 1: for all AT commands, and non-Dial Up Network (non-DUN) data connections. UDP, TCP data socket / data call connections through relevant AT commands.  Channel 2: for Dial Up Network (DUN) data connection. It requires the host to have and use its own TCP/IP stack. The DUN can be initiated on the modem side or terminal/host side.  Channel 3: for u-blox GNSS data tunneling (not supported by the “00” and “01” product versions).

2.5.2 USB interface

SARA-R4 series modules include a high-speed USB 2.0 compliant interface with a maximum 480 Mb/s data rate according to the USB 2.0 specification [11] representing the main interface for transferring high speed data with a host application processor. The module itself acts as a USB device and can be connected to any USB host equipped with compatible drivers. The USB is the most suitable interface for transferring high speed data between SARA-R4 series and a host processor, available for AT commands, dat a communication, FW upgrade by means of the FOAT feature, FW upgrade by means of the u-blox dedicated tool and for diagnostic purposes.

SARA-R4 series - Data sheet UBX-16024152 - R18 Interfaces Page 14 of 43 The USB_D+ / USB_D- lines carry the USB data and signaling, while the VUSB_DET pin represents the input to enable the USB interface by applying an external valid USB VBUS voltage (5.0 V typical). ☞ The USB interface is available as an AT command / data communication interface only if an external valid USB VBUS voltage (5.0 V typical) is applied at the VUSB_DET input of the module since the switch-on of the module, and then held during normal operations. In this case, the UART will not be available. ☞ If the USB interface is enabled, the module does not enter the low power deep sleep mode: the external USB VBUS voltage needs to be removed from the VUSB_DET input of the module to let it enter the Power Saving Mode defined in 3GPP Rel.13. SARA-R4 series modules provide by default a set of two USB functions:  AT commands and data communication  Diagnostic log For more details regarding USB configurations / capabilities, see the SARA-R4 series system integration manual [2].

2.5.3 SPI interface

☞ The SPI interface is not supported by the “00”, “01”, “02”, “52”, “63” and “73” product versions. SARA-R4 series modules include a Serial Peripheral Interface for communications with compatible external device. The SPI interface can be made available as an alternative function, in a mutually exclusive way, over the digital audio interface pins ( I2S_WA / SPI_MOSI , I2S_RXD / SPI_MISO , I2S_CLK / SPI_CLK , I2S_TXD / SPI_CS).

2.5.4 SDIO interface

☞ The SDIO interface is not supported by “00”, “01”, “02”, “52”, “63” and “73” product versions. SARA-R4 series modules include a 4 -bit Secure Digital Input Output interface ( SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, and SDIO_CMD) designed to communicate with external compatible SDIO devices.

2.5.5 DDC (I2C) interface

☞ The DDC (I2C) interface is not supported by the “00” and “01” product versions. SARA-R4 series modules include an I2C -bus compatible DDC interface ( SDA, SCL) available to communicate with a u -blox GN SS receiver and with external I2C devices as for example an audio codec: the SARA-R4 series module acts as an I2C master that can communicate with I2C slaves in accordance with the I2C-bus specifications [12]. The SDA and SCL pins have internal pull-up to V_INT, so there is no need of additional pull-up resistors on the external application board.

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2.6 Audio

☞ Audio is not supported by the “00”, “01”, “02”, “52”, “63” and “73” product versions. SARA-R4 series modules support VoLTE (Voice over LTE Cat M1 radio bearer) for providing audio services. SARA-R4 series modules include an I2S digital audio interface to transfer digital audio data to/from an external compatible audio device. The digital audio interface can be made available as an alternative function, in a mutual ly exclusive way, over the SPI interface pins ( I2S_WA / SPI_MOSI , I2S_RXD / SPI_MISO , I2S_CLK / SPI_CLK , I2S_TXD / SPI_CS).

2.7 GPIO

SARA-R4 series modules include pins that can be configured as general purpose input/output or to provide custom functions as summarized in Table 4 (for further details, see the SARA-R4 series system integration manual [2] and the SARA-R4 series AT commands manual [1]). Function Description Default GPIO Configurable GPIOs Network status indication Network status: registered / data transmission, no service -- GPIO1 GNSS supply enable 19 Enable/disable the supply of a u-blox GNSS receiver connected to the cellular module by the DDC (I2C) interface -- GPIO2 GNSS data ready 19 Sense when a u-blox GNSS receiver connected to the module is ready for sending data by the DDC (I2C) interface -- GPIO3 SIM card detection SIM card physical presence detection -- GPIO5 Ring Indicator 20 Events indicator -- RI Module status indication Module switched off or in PSM low power deep sleep mode, versus active or connected mode -- GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6 Last gasp 20 Input to trigger last gasp notification -- GPIO3, GPIO4, GPIO6 LwM2M pulse 21 Output to notify a settable LwM2M event with a configurable pulse -- GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6 General purpose input Input to sense high or low digital level -- GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6 General purpose output Output to set the high or the low digital level -- GPIO1, GPIO2, GPIO3, GPIO4, GPIO6 Pin disabled Tri-state with an internal active pull-down enabled GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, RI GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, RI Table 4: GPIO custom functions configuration

19 Not supported by “00” and “01” product versions

20 Not supported by “00”, “01” and SARA-R410M-02B-00 product versions

21 Not supported by “00”, “01” and “x2” product versions

SARA-R4 series - Data sheet UBX-16024152 - R18 Pin definition Page 16 of 43

3 Pin definition

3.1 Pin assignment

V_INT RSVD GND GPIO6 RESET_N GPIO1 PWR_ON RXD TXD 24 27 30 5962 56 GND GND DSR DTR GND VUSB_DET GND GND USB_D- USB_D+ RSVD GND GPIO2 GPIO3 SDA SCL GPIO4 GND GND GND SDIO_D2 SDIO_CMD SDIO_D0 SDIO_D1 GND VCC VCC RSVD I2S_TXD / SPI_CS I2S_CLK / SPI_CLK SIM_CLK SIM_IO VSIM GPIO5 VCC SDIO_D3 SDIO_CLK SIM_RST I2S_RXD / SPI_MISO I2S_WA / SPI_MOSI GND GND GND GND GND GND GND GND GND ANT_DET ANT SARA-R4/N4 Top View Pin 65-96: GND Figure 2: SARA-R4 series pin assignment (top view) No Name Power domain I/O Description Remarks

1 GND - N/A Ground All the GND pins must be connected to ground

2 RSVD - N/A RESERVED pin Leave unconnected.

3 GND - N/A Ground All the GND pins must be connected to ground

4 V_INT - O Generic Digital

V_INT = 1.8 V (typical) generated by the module when is switched on, outside low power PSM deep sleep mode. See section 4.2.3 for detailed electrical specs. Provide test point for diagnostic purposes.

5 GND - N/A Ground All the GND pins must be connected to ground

6 DSR GDI O UART data set ready Circuit 107 (DSR) in ITU-T V.24. See section 4.2.12 for detailed electrical specs.

SARA-R4 series - Data sheet UBX-16024152 - R18 Pin definition Page 17 of 43 No Name Power domain I/O Description Remarks 7 RI GDI O UART ring indicator Circuit 125 (RI) in ITU-T V.24. See section 4.2.12 for detailed electrical specs. 8 DCD GDI O UART data carrier detect Circuit 109 (DCD) in ITU-T V.24. See section 4.2.12 for detailed electrical specs.

9 DTR GDI I UART data terminal

Circuit 108/2 (DTR) in ITU-T V. 24. Internal active pull-up to V_INT. See section 4.2.12 for detailed electrical specs. 10 RTS GDI I UART ready to send Circuit 105 (RTS) in ITU-T V.24. Internal active pull-up to V_INT. Flow control is not supported by the “00”, “01” and SARA-R410M-02B-00 product versions See section 4.2.12 for detailed electrical specs. 11 CTS GDI O UART clear to send Circuit 106 (CTS) in ITU-T V.24. Flow control is not supported by the “00”, “01” and SARA-R410M-02B-00 product versions See section 4.2.12 for detailed electrical specs. 12 TXD GDI I UART data input Circuit 103 (TxD) in ITU-T V.24. Internal pull-down to GND on “00” and R410M-02 versions Internal pull-up to V_INT on other product versions See section 4.2.12 for detailed electrical specs. 13 RXD GDI O UART data output Circuit 104 (RxD) in ITU-T V.24. See section 4.2.12 for detailed electrical specs.

14 GND - N/A Ground All the GND pins must be connected to ground

15 PWR_ON POS I Power-on / power-off

Internal 200 k pull-up resistor. See section 4.2.8 for detailed electrical specs. Provide test point for diagnostic purposes. 16 GPIO1 GDI I/O GPIO Configurable GPIO (see section 2.7). See section 4.2.12 for detailed electrical specs. 17 VUSB_DET USB I USB detect input Input for VBUS (5 V typical) USB supply sense. See section 4.2.11 for detailed electrical specs. Provide test point for diagnostic purposes. 18 RESET_N ERS I External reset input Internal 37 k pull-up resistor to V_INT. See section 4.2.9 for detailed electrical specs. Provide test point for diagnostic purposes. 19 GPIO6 GDI I/O GPIO Configurable GPIO (see section 2.7). See section 4.2.12 for detailed electrical specs.

20 GND - N/A Ground All the GND pins must be connected to ground

21 GND - N/A Ground All the GND pins must be connected to ground

22 GND - N/A Ground All the GND pins must be connected to ground

23 GPIO2 GDI I/O GPIO Configurable GPIO (see section 2.7). See section 4.2.12 for detailed electrical specs. 24 GPIO3 GDI I/O GPIO Configurable GPIO (see section 2.7). See section 4.2.12 for detailed electrical specs. 25 GPIO4 GDI I/O GPIO Configurable GPIO (see section 2.7). See section 4.2.12 for detailed electrical specs. 26 SDA DDC I/O I2C bus data line Fixed open drain. Internal 2.2 k pull-up resistor to V_INT. Not supported by “00” and “01” product versions See section 4.2.13 for detailed electrical specs.

SARA-R4 series - Data sheet UBX-16024152 - R18 Pin definition Page 18 of 43 No Name Power domain I/O Description Remarks 27 SCL DDC O I2C bus clock line Fixed open drain. Internal 2.2 k pull-up resistor to V_INT. Not supported by “00” and “01” product versions See section 4.2.13 for detailed electrical specs. 28 USB_D- USB I/O USB Data Line D- 90  nominal differential impedance. Pull-up, pull-down and series resistors, as required by the USB 2.0 specifications [11], are part of the USB pin driver and shall not be provided externally. See section 4.2.11 for detailed electrical specs. Provide test point for diagnostic purposes. 29 USB_D+ USB I/O USB Data Line D+ 90  nominal differential impedance. Pull-up, pull-down and series resistors, as required by USB 2.0 specifications [11], are part of the USB pin driver and shall not be provided externally. See section 4.2.11 for detailed electrical specs. Provide test point for diagnostic purposes.

30 GND - N/A Ground All the GND pins must be connected to ground

31 RSVD - N/A RESERVED pin Leave unconnected.

32 GND - N/A Ground All the GND pins must be connected to ground

33 RSVD - N/A RESERVED pin This pin can be connected to GND.

34 I2S_WA /

SPI_MOSI GDI O / O I2S word alignment / SPI Master Output Slave Input I2S word alignment, alternatively configurable as SPI Master Output Slave Input Not supported by “00”, “01”, “x2”, “x3” product versions See section 4.2.12 for detailed electrical specs.

35 I2S_TXD /

SPI_CS GDI O / O I2S transmit data / SPI Chip Select I2S transmit data out, alternatively configurable as SPI Chip Select Not supported by “00”, “01”, “x2”, “x3” product versions See section 4.2.12 for detailed electrical specs.

36 I2S_CLK /

SPI_CLK GDI O / O I2S clock / SPI clock I2S clock, alternatively configurable as SPI clock Not supported by “00”, “01”, “x2”, “x3” product versions See section 4.2.12 for detailed electrical specs.

37 I2S_RXD /

SPI_MISO GDI I / I I2S receive data / SPI Master Input Slave Output I2S receive data input, alternatively configurable as SPI Master Input Slave Output Not supported by “00”, “01”, “x2”, “x3” product versions See section 4.2.12 for detailed electrical specs. 38 SIM_CLK SIM O SIM clock See section 4.2.10 for detailed electrical specs. 39 SIM_IO SIM I/O SIM data Internal 4.7 k pull-up resistor to VSIM. See section 4.2.10 for detailed electrical specs. 40 SIM_RST SIM O SIM reset See section 4.2.10 for detailed electrical specs. 41 VSIM - O SIM supply output VSIM = 1.80 V typical or 2.95 V typical generated by the module according to the external SIM card type. See section 4.2.3 for detailed electrical specs.