MEIG SLM770A - Turn off

SLM770A Module Hardware Design Manual
MeiG Smart Technology Co., Ltd 77/77
TVS
PWRKEY
S1
Close to S1
Figure 8 Turn on the module using button
Turning on time is illustrated as follows:
VBAT
PWRKEY
RESET_N
STATUS
UART
USB
NOTE
Active
Active
Inactive
Inactive
12s
13s
4s
V
IL
0.5V
100ms
V
IH
=VBAT
约25ms
VDD_EXT
约20ms
Figure 9 Timing of turning on module
Note: Before pulling down PWRKEY pin, VBAT voltage should be guaranteed to be stable. It is
recommended that the time interval between powering up VBAT and pulling down PWRKEY pins should
be no less than 30ms.
3.7.2 Turn Off
Module can be turn off in the following ways: