Hi, does anyone know how long it takes to turn off the wireless transmission if I activate the W_DISABLE pin, how many ms does it take to turn off the transmission?
Did you check if at!gstatus? is changed immediately?
If it is changes immediately, you need to measure the W_DISABLE pin and WWAN_LED pin to see when RF is turned off
I am only asking because I need to know this for PCB design. My question is how many ms exactly is it possible that this shutdown will last at most.
No such information in specification, but how is this affecting pcb design?
I’m afraid I can’t be more specific. It is necessary to disconnect everything that has power consumption or reduce it to a minimum during a power failure. Therefore it is necessary to take this into account when designing the pcb.
You need to see the section about power down sequence during power failure, otherwise, it might damage the modem.
e.g. adding backup battery