2. EXPLANATION OF MODULE FUNCTIONS
2.8 Floppy Disk
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2.8 Floppy Disk
The FDD used in the M600 system has the following specifications. This FDD is compatible with the
2HD (2MB/1.6MB) and 2DD (1MB) recording types.
[FD-235HG-7332 specifications]
Applicable safety standards
UL, CAS, TUV
Operation mode
2MB mode
recording/play
1.6MB mode
recording/play
1MB mode
recording/play
Applicable disk (3.5-inch)
High density (2HD)
High density (2HD) Normal density (2DD)
Unformatted data capacity
2M byte
1.6M byte
1M byte
Working power supply
Single-phase 5V [4.5 to 5.5V]
[Setting layout]
The settings of the FDD must be changed according to the mode being used. The settings for
each mode are explained below.
Ｇ
Ｄ
Ｅ
Ａ
Ｂ
Ｃ
Ｆ
１
２
３
４
ＨＡ
ＲＹ３４
ＲＥＮ
ＩＵ４
ＦＧ
ＤＳ１
ＤＳ０
ＩＲ
ＡＣＤ
（
Ａ
）
Setting pin
ＤＳ3 ＤＳ2
ＡＣＤ
（Ｂ）
[Explanation of settings]
Setting name
Function
HA
1MB mode automatic setting
(this is always ON in the 3-mode specifications)
RY34
READY output enable
DC34
DISK CHANGE output enable
DS0
DRIVE SELECT 0 input enable
DS1
DRIVE SELECT 1 input enable
DS2
DRIVE SELECT 2 input enable
DS3
DRIVE SELECT 3 input enable
IR
LED lighting conditions :
DRIVE SELECT
∗
READY state
ACD
Automatic chucking disable
REN Automatic
recalibration
IU4
IN use input enable
FG Logic
GND
Ｇ
Ｄ
Ｅ
Ａ
Ｂ
Ｃ
Ｆ
１
２
３
４