View source for KC5373B-010 pinout

               .--v--.
 CIC-TO-PAK -> |01 16| (*)
     PPU-A0 -> |02 15| --[C]-> CIC-TO-MB
        VCC -- |03 14| <- \___ one of those pins connects to CIC-CLK
        VCC -- |04 13| <- /
        GND -- |05 12| -- VCC
           +-- |06 11| --+
           +-- |07 10| --+
           +-- |08 09| --+
           |   '-----'   |
           +-------------+--[charge pump] -> CIC-RST

 *Pin 16 is either tied to pin 15 or left floating, depending on the board

This chip was found in many NES NTDEC games and acted like CIC stun [//forums.nesdev.org/viewtopic.php?p=246918#p246918], [//forums.nesdev.org/viewtopic.php?p=204138#p204138]

It's exact behviour is unknown, but PPU-A0 is probably a source of high frequency signal, whose current is amplified and available on pins 6-11. Next, going through charge pump, a negative voltage of around -4V is produced which disables NES' internal CIC.

The role of other signals (CIC-TO-PAK, CIC-TO-MB, CIC-CLK) is open question.

[[Category:Pinouts]]