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CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 39 -
Figure 3-17 Hot swap detection of the USIM card
It is recommended to add a diode protection next to the UIM _DET 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 NC3 module contains five general control signals. The interface is defined
as follows
:
Table 3-13 General GPIO Pin Definitions
Pin
Signal
name
I/O Description
Para
meter
Level value (V)
Remarks
Min Typical Max
1
WAKEUP
_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
VIL
-0.3
0.6
3
GPIO_1
IO
This pin function
has not been
defined
RESERVE,
please keep
it floating
4
W_DISA DI
Flight mode
VIH
1.2
1.8
2