Quectel GSM Series - Page 22

HSPA/UMTS/GSM/GPRS Module Series
UG96&UG95&M95 R2.0 Compatible Design
UG96&UG95&M95 R2.0_Compatible_Design 21 / 42
pulse
4.7K
47K
PWRKEY
UG96/UG95/M95 R2.0
Figure 5: Turn on the Module Using PWRKEY Driving Circuit
The power-on scenario is illustrated as the following figure.
V
IH
≥ 1.3V
VBAT
PWRKEY
(Input)
≥ 100ms
OFF
BOOTING
UG96/UG95
RUNNING
≥ 3.5s
RESET_N
UG96/UG95
>2.3s
T
1
800ms
STATUS
OFF
BOOTING
RUNNING
V
IL
< 0.1*VBAT
V
IH
> 0.6*VBAT
>1s
UG96/UG95
EMERG_OFF
M95 R2.0
M95 R2.0
M95 R2.0
Figure 6: Power-on Scenario
1. When UG96/UG95 is turned on through driving PWRKEY to a low level, please make sure that VBAT
is stable before pulling down PWRKEY pin. The recommended time of T
1
is 100ms. PWRKEY cannot
be pulled down all the time.
NOTES