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Jumpers, headers and push buttons on CM-Panel POE

Push buttons

• P1 - This push button is wired directly to the reset line of Raspberry Compute Module
• P2 - This push button is managed by the co-processor firmware (ATTiny co-processor on CM Panel POE)
• P3 - This push button is wired directly to the reset line of ATTiny co-processor (ATTiny co-processor on CM Panel POE)

Jumpers and Headers

• J4 - ATTiny In-circuit programmer header
• J5 - Normaly open ad normaly closed terminal of on-board relay
• J11 - When this jumper is closed the ATTiny co-processor can't interrupt main power supply
• J16 - Raspberry Compute Module debug port (/dev/ttS1)
• J17
  • Pin 1 and 2 closed: Supercap wired to the charging circuitry
  • Pin 2 and 3 closed: Supercap wired to GND via a discharge resistor
  • All open: Supercap unwired

EXP1 and EXP2 headers

• See the article: Pinout of EXP1 and EXP2 headers (CM-Panel POE)

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