Specifications

— 18 —
Pin No. Terminal In/Out Function
30 INP In Disk detection signal.
31 READY In Ready signal from FDD. (Connected to ground (0V).)
32 WPRT In Write protect signal from FDD.
33 TRKO In Track0 signal from FDD.
34 INDEX In Index signal from FDD.
35 RDATA In Read data signal from FDD.
36, 37, 38 XTAL2, EXTAL2
—
Not used.
39 NC, XTAL1
40 EXTAL1 In Clock signal input from CPU (16 MHz).
41, 42 VSS4, VSS5 In Ground terminal (0 V).
43 NC — Not used.
44 ~ 46
VCC2, VCC3,
In
DVDD (5 V) source.
VCC4
47 WGATE Out Write gate signal to FDD.
48 WDATA Out Write data signal to FDD.
49 VSS6 In Ground terminal (0 V).
50 STEP Out Step signal for FDD head.
51 HDIR Out Head direction signal for FDD.
52 HLOAD Out Not used.
53 HSEL Out Head selection signal for FDD.
54 VSS7 In Ground terminal (0 V).
55 DS0 Out Drive selection signal.
56, 57, 58 DS1, DS2, DS3 — Not used.
59 VSS8 In Ground terminal (0 V).
60 MON0 Out Motor ON signal for FDD.
61, 62, 63
MON1, MON2,
—
Not used.
MON3
64 VSS9 In Ground terminal (0 V).