User's Manual

Smart Machine Smart Decision
SIM7020G_User Manual_V1.00 23 2019-01-15
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Turn on/off impulse
PWRKEY
Power on/off
logic
VBAT
Module
1K
100nF
H
L
40K
Figure 8: Reference power on/off circuit
Note: Do not directly ground the PWRKEY pin, and do not lower GPIO0 before starting the
machine.
The power-on scenarios are illustrated in the following figure.
STATUS
(Output)
T
on
VBAT
PWRKEY
(Input)
T
on(status)
UART Port
Undifined
Active
T
on(uart)
Undifined
Active
USB Port
T
on(usb)
Figure 9: Power on timing sequence