SMD133 (AA6023) pinout
SMD133 (AA6023B): LQFP-48 0.5mm pitch (canonically NES 2.0 Mapper 268 submapper 2/3)
________
PPU A11 -> / 1 48 \ <- PPU A12
PPU A10 -> / 2 47 \ <- CPU A12
VCC -- / 3 46 \ -> CHR A10
GND -- / 4 45 \ -> CHR A16
CPU A1 -> / 5 44 \ -> CHR A11
(PRG A22, may vary) "PX0" $xxx1.1 <- / 6 43 \ -> $xxx0.5 (CHR A19 in submappers 2/3, varies in others)
CHR A13 <- / 7 42 \ -> $xxx0.4 (CHR A18, varies)
CHR A14 <- / 8 41 \ <- CPU D3
CHR A12 <- / 9 SMD133 40 \ <- CPU D2
("HV") CIRAM A10 <- / 10 (AA6023) 39 \ <- CPU D4
CHR A15 <- / 11 38 \ <- CPU D1
CHR A17 <- / 12 37 \ <- CPU D5
PRG A20 <- \ 13 36 / <- CPU D0
/IRQ <- \ 14 35 / -> $xxx1.2 "PX1" (PRG A21, may vary)
/ROMSEL -> \ 15 34 / <- CPU D6
CPU R/W -> \ 16 33 / <- CPU A0
PRG A15 <- \ 17 32 / <- CPU D7
PRG A13 <- \ 18 31 / -> PRG RAM /CE ("EXT CSB")
CPU A14 -> \ 19 30 / <- M2 ("CK18")
K5K7 or K5K6 -> \ 20 29 / -> VFL
PRG A16 <- \ 21 28 / -- VDD
PRG A14 <- \ 22 27 / -> PRG A19
PRG A18 <- \ 23 26 / -> PRG /CE ("POEB")
CPU A13 -> \ 24 25 / -> PRG A17
--------
Legend:
->[SMD]<- Input
<-[SMD]-> Output
--[SMD]-- Power
pin 20:
low / floating: supervisor registers at $7xxx or $6xxx depending on silicon revision
high: supervisor registers at $5xxx
“VFL” is reportedly a diode from VDD, originally intended for powering 3V flash. (Don’t do that, it’s not a good enough voltage regulator).
Names in "" are from Mindkids’s original documentation.
Source: [1]
The AA6023 is also provided as in DIP-40 package, mostly compatible with original AX5202P but a few pins got different purpose.
.--\/--.
M2 -> |01 40| -- VCC
WRAM /CE <- |02 39| <- CPU A1
CPU D7 -> |03 38| -> PRG /CE
CPU A0 -> |04 37| -> PRG A17
CPU D6 -> |05 36| <- CPU A13
CPU D0 -> |06 35| -> PRG A18
CPU D5 -> |07 34| -> PRG A14
CPU D1 -> |08 33| -> PRG A16
CPU D4 -> |09 32| <- CPU A14
CPU D2 -> |10 31| -> PRG A13
CPU D3 -> |11 30| -> PRG A15
CHR A18 <- |12 29| <- CPU R/W
CHR A19 <- |13 28| <- /ROMSEL
CHR A11 <- |14 27| -> /IRQ
CHR A16 <- |15 26| -> CHR A17
CHR A10 <- |16 25| -> CHR A15
PPU A12 -> |17 24| -> CIRAM A10
PPU A11 -> |18 23| -> CHR A12
PPU A10 -> |19 22| -> CHR A14
GND -- |20 21| -> CHR A13
`------'
AX5202P-AA6023
pin 39 has internal pull-down