SMD133 (AA6023) pinout

SMD133 (AA6023): LQFP-48 (canonically NES 2.0 Mapper 268)

             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
 PX0 (=$5001.1) <- /  6            43 \ -> CHR A19
       CHR A13 <- /  7              42 \ -> CHR A18
      CHR A14 <- /  8                41 \ <- CPU D3
     CHR A12 <- /  9     SMD133       40 \ <- CPU D2
    HV (=?) <- / 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 / -> PX1 (=$5001.2)
CPU /ROMSEL -> \ 15                    34 / <- CPU D6
     CPU R/W -> \ 16                  33 / <- CPU A0
      PRG A15 <- \ 17                32 / <- CPU D7
       PRG A13 <- \ 18              31 / -> EXT CSB (=WRAM /CE)
        CPU A14 -> \ 19            30 / ?? CK18
            K5K6 -> \ 20          29 / -- VFL
          PRG A16 <- \ 21        28 / -- VDD
           PRG A14 <- \ 22      27 / -> PRG A19
            PRG A18 <- \ 23    26 / -> POEB (=PRG /CE)
             CPU A13 -> \ 24  25 / -> PRG A17

Source: [1]