Power On/Power Off/Reset Function; Power On - Sunsea AIoT SIMCom SIM7600NA User Manual

3.2

Power on/Power off/Reset Function

3.2.1

Power on

MODULE 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.
Please refer to the following figure for the recommended reference circuit.
Note: Module could be automatically power on by connecting PWRKEY pin to ground via 0R
resistor directly.
The power-on scenarios are illustrated in the following figure.
VBAT
PWRKEY
(Input)
STATUS
(Output)
UART Port
USB Port
VDD_AUX
SIM7600NA_user manual _V1.00
Figure 9: Reference power on/off circuit
T
on
Undefined
Undefined
T
on(vdd_aux)
Figure 10: Power on timing sequence
26
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T
on(status
)
T
on(uart
)
Active
T
on(usb)
2020-1-7
Active