SimCom SIM7000G User Manual

Smart Machine Smart Decision
SIM7000 _Hardware Design _V1.00 2017-05-23
Table 8: Power on timing and electronic characteristic
Symbol
Parameter
Min.
Typ.
Max.
Unit
T
on
The time of active low level impulse of PWRKEY
pin to power on module
72
-
-
ms
T
on(status)
The time from power-on issue to STATUS pin
output high level(indicating power up ready )
4.2
-
-
s
T
on(uart)
The time from power-on issue to UART port ready
3.5
-
-
s
T
on(usb)
The time from power-on issue to USB port ready
3.5
-
-
s
V
IH
Input high level voltage on PWRKEY pin
0.6
0.8
1.8
V
V
IL
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+CPOWD”.
● Method 3: over-voltage or under-voltage automatic power off. The voltage range can be set by
AT command “AT+CBATCHK”.
● Method 4: over-temperature or under-temperature automatic power off.
Note: If the temperature is outside the range of -30~+80 ℃ , some warning will be reported via
AT port. If the temperature is outside the range of -40~+85 ℃ , SIM7000 will be powered off
automatically.
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.
Figure 11: Power off timing sequence

SimCom SIM7000G Specifications

General

Brand	SimCom
Model	SIM7000G
Category	Control Unit
Language	English