Figure 7: Turn On The Module With A Button - Quectel M35 User Manual

these configurations, the URC ―RDY‖ would be received from the UART Port of the module every time
when the module is powered on. For more details, refer to the section ―AT+IPR‖ in document [1].
2. AT command response indicates module is turned on successfully, or else the module fails to be
turned on.
The other way to control the PWRKEY is through a button directly. A TVS component is indispensable to
be placed nearby the button for ESD protection. For the best performance, the TVS component must be
placed nearby the button. When pressing the key, electrostatic strike may generate from finger. A
reference circuit is shown in the following figure.
The turn-on timing is illustrated as the following figure.
VBAT
EMERG_OFF
(INPUT)
PWRKEY
(INPUT)
VDD_EXT
(OUTPUT)
STATUS
(OUTPUT)
MODULE
STATUS
M35_User_Manual
S1
TVS
Close to

Figure 7: Turn On the Module with a Button

T
54ms
1
OFF
Figure 8: Turn-on Timing
Confidential / Released
PWRKEY
S1
>1s
V <0.1*VBAT
IL
800ms
BOOTING
GSM/GPRS Module Series
M35 User Manual
V > 0.6*VBAT
IH
RUNNING
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