Ublox SARA-R4 Series, Руководство по системной интеграции

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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