User's Manual
Table Of Contents
- RF Exposure Statement:
- Copyright
- Contents
- Table Index
- Figure Index
- Revision History
- 1Introduction
- 2Package Information
- 3Interface Application
- 4RF Specifications
- 5Electrical Specifications
- 6SMT Production Guide
- 7Packaging
- Appendix
A7608SA-H_User Manual_V1.00
2022-08-26
Smart Machine Smart Decision
3.2 Power on/Power off/Reset Function
3.2.1
Power on
A7608SA-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.
Please refer to the following figure for the recommended reference circuit.
Figure 9: Reference power on/off 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)
T
on
T
on(status)
T
on(uart)
UART Port
Undefined
Active
USB Port
T
on(usb)
Undefined
Active
Figure 10: Power on timing sequence