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List of Decoupling Capacitors: Difference between revisions

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The SNES has several '''decoupling capacitors''' connected to (mostly) [[VCC]] and ground.  On the jwdonald schematic, some of the are:
The SNES has several '''decoupling capacitors''' connected to (mostly) [[VCC]] and ground.  On the [[jwdonal schematic]], some of the are:


0.1 microfarad:
{| class="wikitable" style="width:auto;"
! Name !! Connectivity !! Capacitance
|-
|C85 || in parallel with the F411 CIC || 0.1 microfarad
|-
|C90 || in parallel with the [[S-CPU]] || 0.1 microfarad
|-
|C91 || in parallel with [[S-PPU1]] || 0.1 microfarad
|-
|C92 || in parallel with [[S-PPU2]] || 0.1 microfarad
|-
|C93 || in parallel with the upper VRAM chip || 0.1 microfarad
|-
|C94 || in parallel with the lower VRAM chip || 0.1 microfarad
|-
|C95 || in parallel with S-WRAM || 0.1 microfarad
|-
|C87 || in parallel with [[S-SMP]] || 0.1 microfarad
|-
|C98 and C99 || in parallel with [[S-DSP]] || 0.1 microfarad
|-
|C100 || in parallel with the lower ARAM chip || 0.1 microfarad
|-
|C101 || in parallel with the upper ARAM chip || 0.1 microfarad
|-
|C84 || in parallel with the [[Video Encoder]] || 1 microfarad
|}


* C85, in parallel with the F411 CIC
This 0.1 microfarad decoupling cap is connected to [[VS]]:
* C90, in parallel with the S-CPU
* C91, in parallel with S-PPU1
* C92, in parallel with S-PPU2
* C93, in parallel with the upper VRAM chip
* C94, in parallel with the lower VRAM chip
* C95, in parallel with S-WRAM
* C87, in parallel with S-SMP
* C98 and C99, in parallel with S-DSP
* C100, in parallel with the lower ARAM chip
* C101, in parallel with the upper ARAM chip
 
1 microfarad:
 
* C84, in parallel with the video encoder


This 0.1 microfarad decoupling cap is connected to [[VS]]:
* C80, in parallel with the [[Pre-Amplifier]] op-amp for the right stereo channel


* C80, in parallel with the upper pre-amplifier op-amp
[[Category:SNES Hardware]]
[[Category:Lists]]

Latest revision as of 07:06, 18 July 2023

The SNES has several decoupling capacitors connected to (mostly) VCC and ground. On the jwdonal schematic, some of the are:

Name Connectivity Capacitance
C85 in parallel with the F411 CIC 0.1 microfarad
C90 in parallel with the S-CPU 0.1 microfarad
C91 in parallel with S-PPU1 0.1 microfarad
C92 in parallel with S-PPU2 0.1 microfarad
C93 in parallel with the upper VRAM chip 0.1 microfarad
C94 in parallel with the lower VRAM chip 0.1 microfarad
C95 in parallel with S-WRAM 0.1 microfarad
C87 in parallel with S-SMP 0.1 microfarad
C98 and C99 in parallel with S-DSP 0.1 microfarad
C100 in parallel with the lower ARAM chip 0.1 microfarad
C101 in parallel with the upper ARAM chip 0.1 microfarad
C84 in parallel with the Video Encoder 1 microfarad

This 0.1 microfarad decoupling cap is connected to VS:

  • C80, in parallel with the Pre-Amplifier op-amp for the right stereo channel
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