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:

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-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

@@ Line 1: / Line 1: @@
-The '''HCU04''' is a hex inverter.  Its inverters appear in six places on the jwdonal schematic:
+[[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]]
-* '''U9A''', inputting SCLK and outputting CIC3, in region D2
+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:
-* '''U9B''', inputting SCLK and outputting CL1, in region D2
-* '''U9C''', in series with U9D and R5, in region A3
+* '''U9A''' outputs CIC3 to the [[Cartridge Slot]]
-* '''U9D''', in parellel with R6 and in series with U9C and C4, in region A3
+* '''U9B''' outputs CL1 to the [[Checking Integrated Circuit|CIC]]
-* '''U9E''', in series with 10 and 11, whatever those are in region A3
-* '''U9F''', in series with 12 and 13, whatever those are in region A3
+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 [[List_of_pull-down_resistors|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'''
+[[Category:SNES Hardware]]
+[[Category:Integrated Circuits]]
+[[Category:ICs with unconnected pins]]