CLM920_AC3 Module Hardware Usage Guide
Shanghai Yuge Information Technology co., LTD
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It is recommended to add a diode protection next to the USIM_PRESENCE pin of the
module.
When using a normally closed SIM card holder or a normally open SIM card holder, the
detection function can be set by the AT command. If AT+HOSCFG=1 is set, the status of
the SIM card is high when the SIM card is in place, and AT+HOSCFG=1 is set. When
the SIM card is in the state, the status is low. Set AT+HOSCFG=0.0 SIM card hot swap
function is off.
3.8 General purpose GPIO interface
The CLM920 AC3 module contains three general control signals. The interface is
defined as follows
：
Table 3-15 General GPIO Pin Definitions
Pin
Signal
name
I/O Description
Para
meter
Level value (V)
Remarks
Min
Typical
Max
1
WAKEU
P_IN
DI
Sleep mode
control
VIH
1.2
1.8
2
VIL
-0.3
0.6
2
AP_REA
DY
DI
Sleep state
detection
VIH
1.2
1.8
2
Developi
ng
VIL
-0.3
0.6
4
W_DISA
BLE#
DI
Flight mode
control
VIH
1.2
1.8
2
Developi
ng
VIL
-0.3
0.6
WAKEUP_IN
:
This pin is the host wake-up module pin. When the WAKEUP_IN signal is pulled low, the
host can wake up the module.
AP_READY
(This feature is under development)
AP_READY
This pin can be used to wake up the host from the module and can be
configured to wake up high or low.
。
W_DISABLE#
：
Flight mode control (this function is under development), when the CLM920 AC3 module
W_DISABLE# signal is pulled low, the module RF function can be turned off, the module
can enter the flight mode, and the module can be turned on to open the module RF function.
