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Back UPS 600 is a 600VA UPS manufactured by APC. I've been doing some little repairs on tweaks on it so i'll be sharing info on it here. It's based on a PIC18F45J50 microcontroller. Board model: 640-1134-Z REV04
[[File:APC Back UPS ES 600.webp|thumb|UPS picture]]

== ICSP pinout ==
Pinout for the ICSP header (J25)