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schematics:apu_pinout [2019/08/27 20:45] (current)
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 +Pins 1 - 4 control the address. ​ Here is the encoding scheme, with 
 +Pin 4 being most significant bit.
 + 
 +2140 = 0010
 +2141 = 0110
 +2142 = 1010
 +2143 = 1110
  
 +Pin 1 is PA7 - Pull this one Low
 +Pin 2 is PA6 - Pull this one High
 +Pin 3 is PA0
 +Pin 4 is PA1
 + 
 +Pin 5 is /WR
 +Pin 6 is /RD
 + 
 +Pins 7-14 is D0-7
 + 
 +Pin 15 is /RESET
 +Pin 16 is Not Connected
 +
 +Pin 17 is SMPCK - output clock pulse, frequency unknown.
 +Pin 18 is Vcc
 +Pin 19 is GND
 +Pin 20 is Mute
 +Pin 21 is Audio output
 +Pin 22 is Audio output
 +Pin 23 is GND
 +Pin 24 is Audio Vcc
 +
 +Credits:
 + The Dumper - Info on Pins 17 and 20.
 +
 +
 +EDIT: Pin 20 Mute does not need to be pulled high for audio output.
 
 schematics/apu_pinout.txt ยท Last modified: 2019/08/27 20:45 (external edit)
 
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