SARA-R404M datasheet(6/43 Pages) U-BLOX

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SARA-R4 series - Data sheet

UBX-16024152 - R18

Functional description

Page 6 of 43

1.3 Block diagram

Memory

V_INT

transceiver

Cellular

BaseBand

Processor

ANT

VCC (Supply)

USB

DDC (I2C)

SIM card detection

SIM

UART

Power-on

Reset

GPIOs

Antenna detection

Switch

19.2 MHz

Power

Management

Filter

SDIO

SPI / Digital audio

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:

DDC (I2C) interface

SDIO interface

SPI interface

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 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:

SDIO interface

SPI interface

Digital audio interface

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