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HCU04: Difference between revisions

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The '''HCU04''' is a hex inverter.  The first two inverters take SCLK from pin 41 of [[S-DSP]] as input:
[[File:u9a%26b_schematic.png|thumb|U9A and U9B in region D2 of the [[jwdonal schematic]]]]
[[File:u9cdef schematic.png|thumb|U9C, U9D, U9E, and U9F, in region A3 of the jwdonal schematic]]
 
The '''HCU04''' is a [https://www.ourpcb.com/hex-inverter-ic.html hex inverter].  The first two inverters take [[SCLK]] from pin 41 of [[S-DSP]] as input:


* '''U9A''' outputs CIC3 to the [[Cartridge Slot]]
* '''U9A''' outputs CIC3 to the [[Cartridge Slot]]
* '''U9B''' outputs CL1 to the [[CIC]]
* '''U9B''' outputs CL1 to the [[Checking Integrated Circuit|CIC]]
 
[[File:u9a%26b_schematic.png|thumb|U9A and U9B in region D2 of the jwdonal schematic]]


The next two inverters help generate [[XIN]]:
The next two inverters help generate [[XIN]]:
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* '''U9E'''
* '''U9E'''
* '''U9F'''
* '''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]]
[[Category:ICs with unconnected pins]]

Latest revision as of 11:06, 20 December 2023

U9A and U9B in region D2 of the jwdonal schematic
U9C, U9D, U9E, and U9F, in region A3 of the jwdonal schematic

The HCU04 is a hex inverter. The first two inverters take SCLK from pin 41 of S-DSP as input:

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-down 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