u-blox SARA-G3 Series - Page 21

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification System description
Page 21 of 218
Function
Pin Name
Module
Pin No
I/O
Description
Remarks
Analog
Audio
MIC_BIAS
SARA-G350
46
O
Microphone
supply output
Supply output (2.2 V typ) for external
microphone.
See section 1.10.11.10.1 for functional description.
See section 2.6.12.6.1 for external circuit design-
in.
MIC_GND
SARA-G350
47
I
Microphone
analog reference
Local ground for the external microphone
(reference for the analog audio uplink path).
See section 1.10.11.10.1 for functional description.
See section 2.6.12.6.1 for external circuit design-
in.
MIC_N
SARA-G350
48
I
Differential analog
audio input
(negative)
Differential analog audio signal input (negative)
shared for all the analog uplink path modes:
handset, headset, hands-free mode.
No internal DC blocking capacitor.
See section 1.10.11.10.1 for functional description.
See section 2.6.12.6.1 for external circuit design-
in.
MIC_P
SARA-G350
49
I
Differential analog
audio input
(positive)
Differential analog audio signal input (positive)
shared for all the analog uplink path modes:
handset, headset, hands-free mode.
No internal DC blocking capacitor.
See section 1.10.11.10.1 for functional description.
See section 2.6.12.6.1 for external circuit design-
in.
SPK_P
SARA-G350
44
O
Differential analog
audio output
(positive)
Differential analog audio signal output (positive)
shared for all the analog downlink path modes:
earpiece, headset and loudspeaker mode.
See section 1.10.11.10.1 for functional description.
See section 2.6.12.6.1 for external circuit design-
in.
SPK_N
SARA-G350
45
O
Differential analog
audio output
(negative)
Differential analog audio signal output (negative)
shared for all the analog downlink path modes:
earpiece, headset and loudspeaker mode.
See section 1.10.11.10.1 for functional description.
See section 2.6.12.6.1 for external circuit design-
in.