Power Down Sim5300E - SimCom SIM5300E Hardware Design

The time of active low level impulse of PWRKEY pin
T
on
to power on module
The time from power-on issue to STATUS pin output
T
on(status)
high level(indicating power up ready )
T The time from power-on issue to UART port ready
on(uart)
T The time from power-on issue to USB port ready
on(usb)
V Input high level voltage on PWRKEY pin
IH
V Input low level voltage on PWRKEY pin
IL
When power on procedure is completed, SIM5300E will send following URC to indicate that the module is
ready to operate at fixed baud rate.
RDY
This URC does not appear when autobauding function is active.
Note: User can use AT command "AT+IPR=x" to set a fixed baud rate and save the configuration to
non-volatile flash memory. After the configuration is saved as fixed baud rate, the Code "RDY" will
be received from the serial port every time when SIM5300E is powered on. For details, please refer
to the chapter "AT+IPR" in document [1].

4.2.2 Power down SIM5300E

SIM5300E will be powered down in the following situations：

Normal power down procedure: power down SIM5300E by the PWRKEY pin.

Normal power down procedure: power down SIM5300E by AT command "AT+CPOWD=1".

Abnormal power down: over-voltage or under-voltage automatically power down.

Abnormal power down: over-temperature or under-temperature automatically power down.
User can power down SIM5300E by pulling down the PWRKEY pin for at least 1 second and then release.
Please refer to the power on circuit. The power down scenario is illustrated in following figure.
SIM5300E_Hardware_Design_V1.02
POWER DOWN SIM5300E BY THE PWRKEY PIN
50 100 -
3 - 5
3 - 5
9 - 15
1.26 1.8 2.0
0 0.54
ms
s
s
s
V
V
18