I'm trying to connect HALL to both primary and secondary inputs on my development board.
Trigger1:
Pin is connected to IC by 10k R55 and shorted SJ2.
It's protected by a 5.1V zener on D14 and a short on D13.
It's pulled up by a 10k R88 and shorted SJ6.
Trigger2:
Pin is connected to IC by 10k R91 and shorted SJ5.
It's protected by a 5.1V zener on D27 and short on D24.
It's pulled up by a 10k R59 and a short on SJ7.
The result
The board boots, but doesn't run lcd_update. Stuck in primary/secondary trigger handler?
This happen even if I disconnect the trigger pins; so I guess I've botched the pull-up.
I have; the signal should look like this 'hall signal -> pulled up by 10k to 5v -> 10k series resistor -> 5v1 zener to ground -> ic1 pin'. Thanks, Dave.
Schematic diagram showing the recommended hall setup
![[hall schematic diagram]](http://www.vems.hu/files/DaveBrul/mini_hall.JPG){kind=link}