HCU04: Difference between revisions

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:

@@ Line 1: / Line 1: @@
+[[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]]
-* '''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]]:
@@ Line 15: / Line 16: @@
 * '''U9E'''
 * '''U9F'''
-[[File:u9cdef schematic.png|thumb|U9C, U9D, U9E, and U9F, in region A3 of the jwdonal schematic]]
 [[Category:SNES Hardware]]
 [[Category:Integrated Circuits]]
 [[Category:ICs with unconnected pins]]