LARA-R6 series - Data sheet

UBX-21004391 - R09

Interfaces

Page 13 of 41

C1-Public

2.4.2 SIM card detection

LARA-R6 series modules provide the SIM detection function over the GPIO5 pin to sense the SIM card

physical presence (as an optional feature) when the pin of the module is properly connected to the

mechanical switch of the SIM car holder (see the system integration manual [2]).

2.5 Serial communication

LARA-R6 series modules provide the following serial communication interfaces:

•

Two UART interfaces: serial interfaces available for the communication with a host application

processor (AT commands, data, FW update by means of FOAT).

•

USB interface: Universal Serial Bus 2.0 compliant interface available for the communication with

a host application processor (AT commands, data communication, FW update by means of the

FOAT feature), for FW update by means of the u-blox EasyFlash tool and for diagnostic.

•

I2C interface: I2C bus compatible interface available for the communication with u-blox GNSS

positioning chips/modules and with external I2C devices as an audio codec.

2.5.1 UART interfaces

LARA-R6 series modules include a main primary Universal Asynchronous Receiver/Transmitter serial

interface (UART) for communication with an application host processor, supporting AT commands,

data communication, multiplexer protocol functionality including virtual channel for GNSS tunneling,

and FW update by means of FOAT:

•

8-wire serial port with RS-232 functionality conforming to ITU-T V.24 recommendation [13], with

CMOS compatible levels (0 V for low data bit / ON state, 1.8 V for high data bit / OFF state)

o

Data lines (RXD output, TXD input),

o

hardware flow control lines (CTS output, RTS input),

o

modem status and control lines (DTR input, DSR output, DCD output, RI output)6

•

Hardware flow control (default factory-programmed setting), or none flow control are supported

•

115’200 bit/s (default factory-programmed setting), 230’400 bit/s, 460’800 bit/s, 921’600 bit/s,

and 3’000’000 bit/s baud rates are supported

•

The default factory-programmed frame format is 8N1 (8 data bits, no parity, 1 stop bit)

LARA-R6 series modules include a secondary auxiliary Universal Asynchronous Receiver/Transmitter

serial interface (UART AUX) for communication with an application host processor, supporting AT

commands, data communication, and FW update by means of FOAT:

•

4-wire serial port with RS-232 functionality conforming to ITU-T V.24 recommendation [13], with

CMOS compatible signal levels (0 V for low data bit / ON state, 1.8 V for high data bit / OFF state)

o

Data lines (DCD as data output, DTR as data input)

o

HW flow control lines (RI as flow control output, DSR as flow control input)

•

Hardware flow control (default setting), or none flow control are supported

•

115’200 bit/s (default setting), 230’400 bit/s, 460’800 bit/s, 921’600 bit/s, and 3’000’000 bit/s

baud rates are supported

•

The default frame format is 8N1 (8 data bits, no parity, 1 stop bit)

The UART serial interfaces can be conveniently configured through dedicated AT commands: see the

AT commands manual [1] (+IPR, +ICF, +IFC, &K, \Q, &S, &D, &C, +UPSV, +USIO, +UUARTCONF AT

commands).

6 Alternatively, DTR, DSR, DCD and RI pins can be mutually exclusively configured as a secondary auxiliary UART interface