SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R08
Objective Specification
Appendix
Page 174 of 188
SARA-G300, SARA-G310 and LISA-U200-00S modules do not support the DDC (I
2
C) interface.
LISA-C2 modules will support the DDC (I
2
C) interface in the upcoming firmware releases.
All LISA-U2 modules, except LISA-U200-00S, additionally support the communication with I
2
C slaves by means of
dedicated AT commands, other than u-blox positioning receivers over the same DDC (I
2
C) interface.
A.4.6
Audio interfaces
Analog audio interfaces
Differential analog audio input is provided on the
MIC_P
/
MIC_N
pins of SARA-G340 / SARA-G350 modules
(without internal DC blocking capacitor) and LISA-C2 series, LISA-U120, and LISA-U130 modules (with an
internal DC blocking capacitor).
Supply output and local ground for an external microphone is provided on the
MIC_BIAS
/
MIC_GND
pins of
SARA-G340 / SARA-G350 modules only: the supply for an external microphone has to be provided by an
external LDO linear regulator with the other modules.
Differential analog audio output is provided on the
SPK_P
/
SPK_N
pins of SARA-G340, SARA-G350, LISA-U120,
LISA-U130 modules (16 ohm load capable) and LISA-C2 series modules (32 ohm load capable).
SARA-G300/SARA-G310, LISA-U100/U110, LISA-U200-00S modules do not provide analog audio interfaces.
LISA-U2 series modules do not provide analog audio interfaces, but analog audio can be provided with external
audio codec connected to a digital audio interface of all LISA-U2 series modules except LISA-U200-00S (e.g. the
4-wire I
2
S digital audio interface provided instead of the 4 analog audio pins). The modules provide control of
the external codec by means of the I
2
C interface and clock reference by means of the
CODEC_CLK
pin.
For further details regarding analog audio interfaces characteristics, usage, and settings, see the related module
datasheet [1], [4], [5], [6], System Integration Manual 1.10.1, 2.7.1, [7], [8], and AT commands manual [3], [9].
Digital audio interfaces
The digital audio interface is provided on the
I2S_TXD
,
I2S_RXD
,
I2S_CLK
,
I2S_WA
pins of SARA-G340 /
SARA-G350 modules (1.8 V, PCM & Normal I2S modes, master, fixed sample rate) and LISA-U120/U130 and all
LISA-U2 series modules except LISA-U200-00S (1.8 V, PCM & Normal I2S modes, master & slave, configurable
sample rate). It is provided on the
PCM_DO
,
PCM_DI
,
PCM_CLK
,
PCM_SYNC
pins of LISA-C2 series modules
(1.8 V, PCM). The same compatible external circuit can be implemented according to external digital audio
device capabilities.
An additional digital audio interface is provided on
I2S1_TXD
,
I2S1_RXD
,
I2S1_CLK
,
I2S1_WA
pins of all
LISA-U2 series except LISA-U200-00S (1.8 V, PCM & Normal I2S modes, master & slave, configurable sample
rate).
SARA-G300/SARA-G310, LISA-U100/LISA-U110, LISA-U200-00S modules do not provide digital audio interfaces.
For further details regarding digital audio interfaces characteristics, usage, and settings, see the related module
datasheet [1], [4], [5], [6], System Integration Manual 1.10.2, 2.7.2, [7], [8], and AT commands manual [3], [9].
A.4.7
GPIO pins
The same compatible external circuit can be implemented for SARA-G340 / SARA-G350 and LISA series: four
1.8 V GPIOs are provided by SARA-G340 / SARA-G350 modules, providing the same functionalities as LISA series
modules except Module Status and Operating Mode Indications. The
SIM_DET
pin provides the SIM detection
function on SARA modules rather than the
GPIO5
pin as on LISA-U series modules.
SARA-G300 and SARA-G310 modules do not provide GPIOs.
A.4.8
Reserved pins
SARA modules
RSVD
pin 33 must be connected to ground, as does the
RSVD
pin 5 on LISA modules.
