GSM/GPRS/NB-IoT Module Series
BC68&M66 Compatible Design
BC68&M66_Compatible_Design 17 / 31
STATUS
VBAT
AT+QPOWD
Log out from the network in 2s~40s
RUNNING
Power-down procedure
OFF
M66
RXD
M66
RUNNING
BC68
OFF
Figure 6: Timing of Power-down through AT Command
1. The parts marked in
green
in the above figure are for BC68.
2. The parts marked in
black
in the above figure are for M66.
3. The time for the module to log out from network depends on local network quality.
4.3.2. Power down M66 Using PWRKEY Pin
It is a safe way to turn off M66 module by driving PWRKEY to a low level voltage for 0.7s~1s, while BC68
could not be turned off by this pin.
The power-down scenario for M66 by PWRKEY is illustrated in the figure below.
VBAT
PWRKEY
(INPUT)
VDD_EXT
(OUTPUT)
Log out from the network in 2s~12s
0.7s<Pulldown<1s
Figure 7: Timing of Power-down for M66 by PWRKEY
NOTES
