Ublox SARA-R422 User Manual

SARA-R4 series - System integration manual
UBX-16029218 - R20 System description Page 39 of 128
C1-Public
the SARA-R4 series module acts as an I2C host which can communicate with I2C devices in
accordance with the I2C bus specifications [11].
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.
1.10 Audio
☞ Audio is not supported by current product versions: I2S pins should not be driven from external.
SARA-R422S and SARA-R422M8S modules are designed to support Voice over LTE Cat M1 radio
bearer (VoLTE) and Circuit-Switched Fall-Back over 2G radio bearer (CSFB) audio services. The
modules accordingly include an I2S digital audio interface (I2S_WA, I2S_RXD, I2S_CLK, and I2S_TXD)
to transfer digital audio data to/from an external compatible audio device.
1.11 General Purpose Input/Output
SARA-R4 series modules include pins which can be configured as General Purpose Input/Output or to
provide custom functions via u-blox AT commands (for more details see the SARA-R4 series AT
commands manual [2], +UGPIOC, +UGPIOR, +UGPIOW AT commands), as summarized in Table 9.
Function
Description
Default GPIO
Configurable GPIOs
Network status
indication
Network status: registered / data transmission, no service
--
GPIO1
GNSS supply enable
31
Enable/disable the supply of a u-blox GNSS receiver
connected to the cellular module by the I2C
--
GPIO2
GNSS data ready
31
Sense when a u-blox GNSS receiver connected to the
module is ready for sending data by the I2C
--
GPIO3
SIM card detection
SIM card physical presence detection
--
GPIO5
Ring Indicator
32
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
32
Input to trigger last gasp notification
--
GPIO3, GPIO4, GPIO6
33
Faster and safe
power-off
34
Input to trigger emergency faster and safe shutdown of the
module (as triggered by AT+CFUN=10)
--
GPIO3, GPIO4
LwM2M pulse
35
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
All
All
Table 9: SARA-R4 series modules GPIO custom functions configuration
31
Not supported by SARA-R410M-01B, SARA-R422, or SARA-R422M8S product versions
32
Not supported by SARA-R410M-01B, SARA-R410M-02B-00, or SARA-R422 product versions
33
Not supported by SARA-R422S, or SARA-R422M8S product versions
34
Not supported by SARA-R410M, or SARA-R412M product versions
35
Not supported by SARA-R410M-01B, SARA-R410M-02B-00, SARA-R410M-02B-01, SARA-R410M-02B-02, SARA-R410M-52B,
SARA-R412M-02B-00, SARA-R412M-02B-01, or SARA-R412M-02B-02 product versions

Ublox SARA-R422 Specifications

General

Brand	Ublox
Model	SARA-R422
Category	Control Unit
Language	English