Smart Machine Smart Decision
SIM7000 _Hardware Design _V1.04 2018-1-31
T
on
The time of active low level impulse of PWRKEY
pin to power on module
1 - - s
T
on(Vdd)
The time from power-on issue to VDD_EXT pin
64 ms
T
on(status)
The time from power-on issue to STATUS pin
output high level(indicating power up ready )
4.5 - - s
T
on(uart)
The time from power-on issue to UART port ready 4.5 - - s
The time from power-on issue to USB port ready
Input high level voltage on PWRKEY pin
V
Input low level voltage on PWRKEY pin -0.3 0 0.5 V
3.2.2 Power off
The following methods can be used to power off SIM7000.
● Method 1: Power off SIM7000 by pulling the PWRKEY pin to ground.
● Method 2: Power off SIM7000 by AT command “AT+ CPO WD =1”.
● Method 3: over-voltage or under-voltage automatic power off. The function can be enabled by
AT command “AT+CBATCHK=1”. Default is disabled.
Note: For details about “AT+CPOWD” and “AT+CBATCHK”, please refer to Document [1].
These procedures will make modules disconnect from the network and allow the software to enter a
safe state, and save data before module be powered off completely.
The power off scenario by pulling down the PWRKEY pin is illustrated in the following figure.
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