KC5373B-010 pinout: Difference between revisions
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+-------------+--[charge pump] -> CIC-RST | +-------------+--[charge pump] -> CIC-RST | ||
*Pin 16 is | *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] | 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] | ||
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The role of other signals (CIC-TO-PAK, CIC-TO-MB, CIC-CLK) is open question. | The role of other signals (CIC-TO-PAK, CIC-TO-MB, CIC-CLK) is open question. | ||
[[Category:Pinouts]] | |||
Latest revision as of 03:23, 17 February 2023
.--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 [1], [2]
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.
