Casio WK-1800 Service Manual page 12

FDD UNIT (DF354H064C)
FDD Specifications:
1 Memory Capacity (under un-format) : 1.6 MByte
2 Density of track : 5.33 track/mm (135 TPI)
3 Number of track : 77 track/side
4 Number of head : 2
5 Rate of data transfer : 500 kbps
6 Access time (between two tracks) : 3 m seconds
7 Compensation of writing data : 125 n second (all tracks)
8 Rotation speed : 360 Min
FDD Interface:
Host system
Drive Select 1
Motor ON
Direction
Step
Write Data
Write Gate
Side 1 Select
DC.GND
+5 V
N.C
System Frame GND.
(rpm) ± 1.5 %
-1
CN2 connector
12
16
18
20
22
24
32
GND Pin Numbers of CN2:
1, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33
Non connected Pin Numbers of CN2:
2, 6, 10, 14 (Pin #3 is removed to prevent erroneous insertion)
CN1 connector
1
4
— 11 —
Drive
4 Density Select
8 Index
26 Track 00
28 Write Protect
30 Read Data
34 Disk Change
2 +5 V Return
3 +5 V Return
Drive Frame GND.
Signal GND
0 Ω