Fibocom MG661-EU - Page 53

3 Application Interfaces
50
Exiting the PSM mode:
1. Wake up through the PSM_EXT_INT pin, and active at high level.
2. Wake up by a PWRKEY button.
3. Wake up by TAU.
"*" indicates that the PSM function of the MG661 module is being debugged.
PSM_EXT_INT is a PSM wake-up pin. The PSM_EXT_INT pin is not defined
in MG661 separately. If PSM pin wake-up function is required, PSM_EXT_INT
can be implemented on GPIO0-7 pin, such as DTR (PIN19) pin.