CLM920_RC3(RV3 RE3)LCC Series CAT1 Module Hardware Manual
Shanghai YUGE Information Technology Co., Ltd.
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Figure 3-19 USIM card hot swap detection
It is recommended to add a diode protection next to the USIM_PRESENCE pin measured
by the module.
When using the normally closed SIM card holder or the normally open SIM card holder,
the detection function can be set through the AT command. If set AT + HOSCFG = 1,1
SIM card status is high, set AT + HOSCFG = 1,0 SIM card status is low, set AT +
HOSCFG = 0,0 SIM card hot swap function is off.
3.8 General GPIO interface
The CLM920_RC3 module contains 4 general GPIO control signals. The interface is defined
as follows
:
Table 3-17 General GPIO pin definition
Pin
Signal name
I/O
Description
1
WAKEUP_IN
DI
Sleep mode control
2
GPIO74
IO
General GPIO, 1.8V voltage domain
3
GPIO69
IO
General GPIO, 1.8V voltage domain
4
W_DISABLE#
DI
Function are being developed
WAKEUP_IN:
This pin is the host wake-up module pin. When the WAKEUP_IN signal is pulled high, the
host can wake up the module.
GPIO69 is a general-purpose GPIO with a 1.8V voltage domain. The GPIO does not support