Casio WK-1800 Service Manual page 18

Pin No. Terminal
30 INP
31 READY
32 WPRT
33 TRKO
34 INDEX
35 RDATA
36, 37, 38 XTAL2, EXTAL2
39 NC, XTAL1
40 EXTAL1
41, 42 VSS4, VSS5
43 NC
VCC2, VCC3,
44 ~ 46
VCC4
47 WGATE
48 WDATA
49 VSS6
50 STEP
51 HDIR
52 HLOAD
53 HSEL
54 VSS7
55 DS0
56, 57, 58 DS1, DS2, DS3
59 VSS8
60 MON0
MON1, MON2,
61, 62, 63
MON3
64 VSS9
In/Out
In Disk detection signal.
In Ready signal from FDD. (Connected to ground (0V).)
In Write protect signal from FDD.
In Track0 signal from FDD.
In Index signal from FDD.
In Read data signal from FDD.
Not used.
—
In Clock signal input from CPU (16 MHz).
In Ground terminal (0 V).
— Not used.
DVDD (5 V) source.
In
Out Write gate signal to FDD.
Out Write data signal to FDD.
In Ground terminal (0 V).
Out Step signal for FDD head.
Out Head direction signal for FDD.
Out Not used.
Out Head selection signal for FDD.
In Ground terminal (0 V).
Out Drive selection signal.
— Not used.
In Ground terminal (0 V).
Out Motor ON signal for FDD.
Not used.
—
In Ground terminal (0 V).
— 17 —
Function