ΜPD765A

μPD765A/B

The μPD765A/B (NEC) or Z0765A (Zilog) is Floppy Disk Controller (FDC) IC. It used in ZX Spectrum +2A/2B, +3/3B.

Pinout:

RESET < RD < WR < CS < D/S < D0 < D1 < D2 < D3 < D4 < D5 < D6 < D7 < DRQ < DAQ < TC < IDX < INT < CLK < (0V) GND <

1 °       40 2         39 3         38 4         37 5         36 6         35 7         34 8         33 9         32 10        31 11        30 12        29 13        28 14        27 15        26 16        25 17        24 18        23 19        22 20        21

> VCC (+5V) > RW/SEEK > LCT/DIR > FR/STP > HDL > RDY > WP/TS > FLT/TR0 > PS0 > PS1 > WDA > US0 > US1 > HD > MFM > WE > VCO/SYNC > RDD > RDW > WCK