# Jumpers, headers and push buttons

## 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 (@article='cmpanel-poe_attiny')
* P3 - This push button is wired directly to the reset line of ATTiny co-processor (@article='cmpanel-poe_attiny')

<img src="./push_buttons.jpg" style="max-width:840px; width:100%;">

## 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


<img src="./headers.jpg" style="max-width:1024px; width:100%;">

## EXP1 and EXP2 headers

* See the article: @article='pinout_cmpanel-poe'

<hr>
@include='adv_cmpanel'
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