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Reset Traces: Difference between revisions
From SnesLab
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=== See Also === | === See Also === | ||
* [[Reset Button]] | * [[Reset Button]] | ||
* [[STP]] | |||
[[Category:SNES Hardware]] | [[Category:SNES Hardware]] | ||
[[Category:Traces]] | [[Category:Traces]] | ||
Revision as of 10:19, 25 July 2024
The SNES has a few traces used in system resetting:
/RESOUT0 allows S-PPU2 to reset S-PPU1. It is produced by pin 33 of PPU2 and goes into pin 98 (/RESET) of PPU1. It is not connected to anything else.
/RESOUT1 is produced by pin 28 of S-PPU2 and passes through R74 before combining with the voltage supervisor reset output. Then, /RESOUT1 goes into these pins, all of which are labled /RESET:
- pin 50 of the S-CPU
- pin 8 of WRAM
- pin 26 of the Cartridge Slot
- pin 37 of the S-SMP
- pin 19 of the Expansion Port
- pin 47 of the S-DSP
The trace (not pin) labeled /RESET on the jwdonal schematic is produced by pin 10 (P10) of the CIC and is what actually resets PPU2 (going into pin 34).