Sunsea AIoT SIMCom SIM7075G User Manual page 26

Table 11: Power off timing and electronic characteristic
Symbol Parameter
The active low level time pulse on PWRKEY pin to
Toff
power off module
The time from power-off issue to VDD_EXT pin output
Toff(vdd)
low level
Toff(status The time from power-off issue to STATUS pin output
) low level(indicating power off )*
Toff(uart) The time from power-off issue to UART port off
Toff(usb) The time from power-off issue to USB port off
Toff-on The buffer time from power-off issue to power-on issue 2
NOTE
The STATUS pin can be used to detect whether module is powered on or not. When module has been
powered on and firmware goes ready, STATUS will be high level, or else STATUS will still low level.
3.3 UART Interface
SIM7075G can provide 3channels serial ports:
www.simcom.com
Figure 10: Power off timing sequence
SIM7075G User Manual V1.00
Time value
Min. Typ. Max.
1.2 - -
1.8 - -
1.8 - -
1.8 - -
1.8 - -
- -
Unit
s
s
s
s
s
s
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