VRC7 pinout
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Legend: ------- (s) means this pin connects to the System (r) this only connects to the ROM (w) this is a SRAM/WRAM connection only PRG : these connect to the PRG ROM and/or fami's PRG pins WRAM : this hooks to the WRAM Note: There is a 3.58Mhz ceramic resonator connected to the "X1" and "X2" pins. it is the three-pin style with internal caps tied to the third pin which is grounded. Chip is physically marked: "VRV VII 053982" .----\/----. *1 (RAM&s) CHR /OE - |01 48| - NC *1 (RAM&s) CHR /CE - |02 47| - M2 (s) GND - |03 46| - /CE WRAM (w) (s) R/W - |04 45| - PRG /A15 (s) (aka /CE) (s) /IRQ - |05 44| - PRG ROM /CE (r) (s) CIRAM A11 - |06 43| - Audio Out (s) PD0 - |07 42| - +5V (s) PD1 - |08 41| - NC (s) PD2 - |09 40| - NC (s) PD3 - |10 39| - NC (s) PD4 - |11 38| - NC (s) PD5 - |12 37| - NC (s) PD6 - |13 36| - CHR RAM A12 (s) PD7 - |14 35| - CHR RAM A11 +5V - |15 34| - CHR RAM A10 (s) PRG A5 - |16 33| - CHR A12 (s) Crystal X2 - |17 32| - CHR A11 (s) Crystal X1 - |18 31| - CHR A10 (s) (s) PRG A4 - |19 30| - +5V (r) PRG ROM A13 - |20 29| - PRG A14 (s) (r) PRG ROM A14 - |21 28| - PRG A13 (s) (r) PRG ROM A15 - |22 27| - PRG A12 (s) (r) PRG ROM A16 - |23 26| - PRG ROM A18 (r) GND - |24 25| - PRG ROM A17 (r) | | `----------'