User's Manual

Smart Machine Smart Decision
SIM7600E-H_User Manual_V1.00 2017-10-11
3.2 Power on/Power off/Reset Function
3.2.1 Power on
SIM7600E-H can be powered on by pulling the PWRKEY pin down to ground.
The PWRKEY pin has been pulled up with a diode to 1.8V internally, so it does not need to be
pulled up externally. It is strongly recommended to put a100nF capacitor, an ESD protection diode,
close to the PWRKEY pin as it would strongly enhance the ESD performance of PWRKEY
pin.
Note:
Module could be automatically power on by connecting PWRKEY pin to ground via 0R
r
esistor directly.
The power-on scenarios are illustrated in the following figure.
STATUS
(Output)
T
on
VBAT
PWRKEY
(Input)
T
on(status)
UART Port
Undefined
Active
T
on(uart)
Undefined
Active
USB Port T
on(usb)
Figure 10: Power on timing sequence