Shanghai SIMCom Wireless Solutions Limited 201802 User Manual
Smart Machine Smart Decision
SIM7600V-H_User Manual_V1.00
2018-02-24
24
For details about “AT+CPOF” and “AT+CPMVT”, 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 modules are powered off completely.
The power off scenario by pulling down the PWRKEY pin is illustrated in the following figure.
safe state and save data before modules are powered off completely.
The power off scenario by pulling down the PWRKEY pin is illustrated in the following figure.
(Output)
T
off
( Input)
T
off(status)
UART Port
Undefined
Active
T
off(uart)
T
on
T
off-on
USB Port
Undefined
Active
T
off(usb)
PWRKEY
STATUS
Figure 10: Power off timing sequence
Table 9: Power off timing and Electronic Characteristic
Symbol
Parameter
Time value
Unit
Min.
Typ. Max.
T
off
The active low level time pulse on PWRKEY pin to
power off module
power off module
2.5
--
--
s
T
off(status)
The time from power-off issue to STATUS pin output
low level(indicating power off )*
low level(indicating power off )*
22
-
-
s
T
off(uart)
The time from power-off issue to UART port off
15
-
-
s
T
off(usb)
The time from power-off issue to USB port off
15
-
-
s
T
off-on
The buffer time from power-off issue to power-on
issue
issue
0
-
-
s
3.2.3
Reset Function
Module can be reset by pulling the RESET pin down to ground.
Note: This function is only used as an emergency reset when AT command “AT+CPOF” and the
PWRKEY pin all have lost efficacy.
PWRKEY pin all have lost efficacy.