View source for UM6558 and UM6559 pinout

[[Category:pinouts]]
UM6558 is PPU with additional 8 pins (CD0..CD7) that are used to output currently rendered pixel color.
             .--\/--.
      R/W -> |01  48| -- +5V
   CPU D0 <> |02  47| -> ALE
   CPU D1 <> |03  46| <> PPU AD0
   CPU D2 <> |04  45| <> PPU AD1
   CPU D3 <> |05  44| <> PPU AD2
   CPU D4 <> |06  43| <> PPU AD3
   CPU D5 <> |07  42| <> PPU AD4
   CPU D6 <> |08  41| <> PPU AD5
   CPU D7 <> |09  40| <> PPU AD6
 *    /CS -> |10  39| <> PPU AD7
 * CPU A2 -> |11  38| -> PPU A8
 * CPU A1 -> |12  37| -> PPU A9
 * CPU A0 -> |13  36| -> PPU A10
      GND ?? |14  35| -> PPU A11
      GND ?? |15  34| -> PPU A12
      GND ?? |16  33| -> PPU A13
      GND ?? |17  32| -> /RD
 *    VCC ?? |18  31| -> /WR
 *    CLK -> |19  30| -> CD0   *
 *   /INT <- |20  29| -> CD1   *
 *   /RST -> |21  28| -> CD2   *
 *    CD7 <- |22  27| -> CD3   *
 *    CD6 <- |23  26| -> CD4   *
 *    GND -- |24  25| -> CD5   *
             '------'
* =  difference with respect to the common 40-pin PPU pinout

UM6559 is DAC that is capable of generating RED/GREEN/BLUE/SYNC/CHROMA/LUMA signals from of the CD0..CD7 values
             .--\/--.
      CD4 -> |01  24| <- CD3
      CD5 -> |02  23| <- CD2
      +5V -- |03  22| <- CD1
       A1 -> |04  21| <- CD0
       A2 -> |05  20| -- GND
     LUMA <- |06  19| <- BIAS
    ?? NC -> |07  18| -> BLUE
     SYNC <- |08  17| -> GREEN
      CD6 -> |09  16| -> RED
      CD7 -> |10  15| -- +5V
      CLK -> |11  14| -> CHROMA
      GND -- |12  13| -> NC ??
             '------'
			 
Sources:
* [http://www.emu-land.net/forum/index.php/topic,27910.msg1252488.html#msg1252488 Emu-Land forum post with diagram showing difference between UM6558 vs UM6538]
* [//forums.nesdev.org/viewtopic.php?p=190185#p190185 Leaked short datasheet for UM6559]
* [//forums.nesdev.org/viewtopic.php?p=248118#p248118 Krzysiobal's reverse-engineering of UM6559 in isolation]