Namcot 163 family pinout

Namcot 163: 48-pin QFP

                             /   \
            (n) SOUND   <-  /01 48\ -> CHR A14 (r)
           (r) CHR A13 <-  /02   47\ -> CHR A15 (r)
          (r) CHR A12 <-  /03     46\ -> CHR A16 (r)
         (r) CHR A11 <-  /04       45\ -> CHR A17 (r)
        (s)*CHR A10 <-  /05         44\ -> ?
               GND  -  /06           43\ -- +5v
      (r) PRG A18 <-  /07             42\ -> CIRAM /CE (n)
     (r) PRG A17 <-  /08               41\ -> CHRROM /CE (r)
    (r) PRG A16 <-  /09                 40\ -> *WRAM /CE (w)
   (r) PRG A15 <-  /10                   39\ -> /IRQ (n)
  (r) PRG A14 <-  /11                     38\ <- CHR A10 (n)
 (r) PRG A13 <-  /12                       37\ <- CHR A11 (n)
 (s)  PRG D7 <-> \13                       36/ <- CHR A12 (n)
  (s)  PRG D6 <-> \14                     35/ <- CHR A13 (n)
   (s)  PRG D5 <-> \15                   34/ -- GND?
    (s)  PRG D4 <-> \16                 33/ <- CHR nRD (n)
     (s)  PRG D3 <-> \17               32/ -- +5V
      (s)  PRG D2 <-> \18             31/ -- GND
               +5v  -  \19           30/ <- M2 (n)
        (s)  PRG D1 <-> \20         29/ <- PRG R/W (n,w)
         (s)  PRG D0 <-> \21       28/ <- PRG /CE (n)
                  GND  -  \22     27/ <- PRG A14 (n)
           (r) PRG /CE  -> \23   26/ <- PRG A13 (n)
            (s) PRG A11  -> \24 25/ <- PRG A12 (s)
                             \   /
                              \_/
05 also connects to CIRAM A10
19 Some boards connect a battery (through a standard diode switch) to this pin to make the waveform memory nonvolatile
32 Some boards connect a battery to this pin instead
33 Ground this pin with if CHR's nOE and nCS lines are separate
34 Probably an input instead of a power supply, can't find an example of it being used
40 6264 /CE connected to this pin
44 Might be an enable for CHR RAM, can't find an example of it being used

The Namcot 129, 175, and 340 are very similar, but not identical.