2.6 Switch Interface
J5 is the reserved power switch interface, using 2.54mm pitch white interface, and you need to let the external switch leads
docking when using. Its function is to skip the power management circuit and control the board's power on or off directly.
If you use the J5 as the power switch, it may cause the situation that it can't be switch off after power on. This is because the
application has the software power off. In this case, you need to modify the application to cancel the software control or remove
the MOS N1 on the circuit.
2.7 ON/OFF KEY
K1 is the power switch for the board. It is able to power on or off when pressing in long time (3-5 seconds), and wake-up
when pressing in short time (1 second).
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