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How to auto power on without power key

1.When system starting up, R1022 and R1021 form a bias voltage to turn on Q1003.
2.After 2.5 seconds, the software controls HDMI_LEVEL_EN(GPIO) from Low to High to turn on Q1002 and turn off Q1003.
3.The production line can disable auto-power on circuit by short-circuiting TP1003 and TP1004.

Updated by Lion Wang over 2 years ago · 4 revisions