Analog Audio Interface - Quectel UC15 Hardware Design

NOTE
URC can be output from UART port, USB AT port and USB modem port by command AT+QURCCFG.
The default port is USB AT port.
In additional, RI behavior can be configured flexible. The default behavior of the RI is shown as below.
Table 12: Behavior of the RI
State
Idle
URC
The RI behavior can be changed by command AT+QCFG="urc/ri/ring", refer to document [1] for
details.

3.11. Analog Audio Interface

The module provides two analog input channels and two analog output channels.
Table 13: Pin Definition of the Audio Interface
Interface Pin Name
AIN1/ MIC1P
UC15_Hardware_Design
Response
RI keeps in high level.
RI outputs 120ms low pulse when new URC is reported.
Figure 20: RI Behavior
Pin No. I/O
23 AI
Description
Audio positive input.
Confidential / Released
UMTS/HSDPA Module Series
UC15 Hardware Design
Comment
If it is unused, keep open.
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