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1 OSC1
2 OSC2
3 CLK1 (Clock for uPD765)
4 NC
5 RD DATA
6 WINDOW
7 DATA
8 MFM/nFM
9 MIN/nSTD
10 Vss (GND)
11 CONTROL
12 OFFSET
13 LPF
14 WCLK
15 CLK2 (Clock for FD179x)
16 NC
17 NC
18 Vdd (+5V)

If you need more information, please let me know.