Riden RD6018 - Front Power Switch - Modification

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18.3. Front Power Switch - Modification
{To Do: Insert instructions for adding a front power switch}
{Reference from Change logs:
+ Added option "Power Switch" to turn On/Off the primary PSU. (5V standby power
supply required). (Note: Adds a 3 second power-on delay).
The control output is routed to the PA14 port (pin 4 of the J2 connector). High level - turn
on, floating or low level - turn off.
Note: the maximum load on the port is 20mA !!! (it is better to use an
optocoupler).}