SimCom SIM7600V-H

Smart Machine Smart Decision
SIM7600V-H_User Manual_V1.00 2018-02-24
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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.
(
Output
)
T
off
( Input
)
T
off(status)
UART Port
UndefinedActive
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
2.5
--
--
s
T
off(status)
The time from power-off issue to STATUS pin output
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
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.