Cavli Wireless C100QM/C10QM Hardware Manual
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The RI pin idle state is low. When a short message or voice incoming call is received, the
RI outputs a rectangular wave with a period of 500ms (high level for 250ms, low level for
250ms) to wake up the host.
Figure 3-15 RI pin signal waveform
DTR:
The DTR pin can be used as the sleep wake-up pin of the C100QM/C10QM module.
When the module enters sleep, the DTR pin can be pulled low to wake up the module.
✧ Pull the DTR pin high first
✧ Send AT+DISABLEUSB=1, AT+CSCLK=1, after the module enters sleep
✧ Low DTR pin wake-up module
3.7 USIM interface
The C100QM/C10QM module provides a USIM card interface compatible with the ISO
7816-3 standard. The USIM card power supply is provided by the module's internal power
manager and supports 1.8V/3.0V
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