Low power options

M2.0 has several low-power options. One of them is called:

"J1850 / ISO 9141 Low Power Control"

We have 2 microcontroller-controlled switches that allow "+12V_SW" and "+5V_SW" to be powered on or off depending on conditions.

The signal "J1850_9141_ON" controls this and is connected to the SAM3X pin number 120 (PB5)

Here is the code to turn on and off the 12V and 5V rails: