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HCU04: Difference between revisions
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The '''HCU04''' is a hex inverter. | The '''HCU04''' is a hex inverter. The first two inverters take SCLK from pin 41 of [[S-DSP]] as input: | ||
* '''U9A''' | * '''U9A''' outputs CIC3 to the [[Cartridge Slot]] | ||
* '''U9B''' | * '''U9B''' outputs CL1 to the [[CIC]] | ||
* '''U9C''', | |||
* '''U9D''' | [[File:u9a%26b_schematic.png|thumb|U9A and U9B in region D2 of the jwdonal schematic]] | ||
* '''U9E''' | |||
* '''U9F''', | The next two inverters help generate [[XIN]]: | ||
* '''U9C''' appears to undo the inversion that U9C did, and sends the output to R5, which eventually becomes XIN after passing by the pull-up R4 | |||
* '''U9D''' is in parallel with R6, receiving its input from C4 and outputting to U9C | |||
The last two inverters take ground as input and their outputs are not connected: | |||
* '''U9E''' | |||
* '''U9F''' | |||
[[File:u9cdef schematic.png|thumb|U9C, U9D, U9E, and U9F, in region A3 of the jwdonal schematic]] | |||
[[Category:SNES Hardware]] | [[Category:SNES Hardware]] | ||
[[Category:Integrated Circuits]] | [[Category:Integrated Circuits]] |
Revision as of 20:59, 4 May 2023
The HCU04 is a hex inverter. The first two inverters take SCLK from pin 41 of S-DSP as input:
- U9A outputs CIC3 to the Cartridge Slot
- U9B outputs CL1 to the CIC
The next two inverters help generate XIN:
- U9C appears to undo the inversion that U9C did, and sends the output to R5, which eventually becomes XIN after passing by the pull-up R4
- U9D is in parallel with R6, receiving its input from C4 and outputting to U9C
The last two inverters take ground as input and their outputs are not connected:
- U9E
- U9F