External Reset - SimCom SIM5300E Hardware Design

When the module works normally, if the user wants to restart the module, follow the procedure below:

Power down the module.

Wait for at least 15S after STATUS pin changing to low level.

Power on the module.
PWRKEY
STATUS

4.3 EXTERNAL RESET

The external RESET pin is used to reset the module. This function is used as an emergency reset only when
AT command "AT+CPOWD=1" and the PWRKEY pin are of no avail. The reset timing is illustrated in the
following figure.
VBAT
NRESET
STATUS
（OUTPUT）
V
This pin is already pulled up in the module, so the external pull-up resistor is not necessary. A 100pF
capacitor close to the RESET pin is strongly recommended. A reference circuit is shown in the following
figure.
SIM5300E_Hardware_Design_V1.02
Power down
Figure 14: Timing of restart SIM5300E
Typ: 100uS
V > 1.3V
IH
V < 0.6V
IL
< 0.2V
OL
Figure 15: Reset timing
Delay > 15S
Restart
Min: 8S
V > 1.6V
OH
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