UMTS/HSPA Module Series
UG96 Hardware Design
UG96_Hardware_Design 30 / 76
PWRKEY
S1
Close to S1
TVS
Figure 10: Turn on the Module Using Keystroke
The turn on scenarios is illustrated as the following figure.
V
IL
≤
0.5V
V
IH
≥
1.3V
VBAT
PWRKEY
(Input)
≥
100ms
OFF
BOOTING
Module
Status
RUNNING
≥
3.5s
RESET_N
STATUS
>2.3s
NOTE
Figure 11: Timing of Turning on Module
Please make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is no
less than 30ms. It is not suggested to pull down PWRKEY pin all the time.
3.7.2. Turn off Module
Any of the following methods can be used to turn off the module:
⚫
Normal power down procedure: Turn off the module using command
AT+QPOWD
.
⚫
Emergency power down procedure: Turn off the module using the PWRDWN_N pin.
NOTE