User's Manual

UMTS/HSDPA Module Series
UC15 Hardware Design
UC15_Hardware_Design Confidential / Released 40 / 78
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
Figure 20: RI Behavior
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
State Response
Idle RI keeps in high level.
URC RI outputs 120ms low pulse when new URC is reported.
Interface Pin Name Pin No. I/O Description Comment
AIN1/ MIC1P 23 AI Audio positive input. If it is unused, keep open.
NOTE