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SECTION 4
INTERFACE DESCRIPTION
4-1. HOST SYSTEM INTERFACE
The SONY OA-D30V drive is compatible with
conventional floppy disk controllers. The interface
consists of 13 signal lines for data, control and hand-
shaking (see Figure 4-1 ).
SELECT 0
SELECT 1
- -
DIRTN
- -
STEP
WRTDATA
WRTGATE
FLOPPY
DISK
HDLOAD
FLOPPY DISK
CONTROLLER
(RESERVED)
- -
INDEX
TRAKOO
WRTPRT
RDDATA
READY
Figure 4-1. SIGNAL INTERFACE DIAGRAM
4-2. INTERFACE CHARACTERISTICS
4-2-1. I nput Signal Requirements
The input signals to the drive unit have the following
requirements at OA-D30V's input terminal:
Logical Zero
0.0 V to +0.8 V
Logical One
+2.0 V to +5.25 V
Input Impedance
1000 ohms
-9-
4-2-2. Output Signal Characteristics
The output signals from
following characteristics:
True
=
Logical Zero
Output Current
False
=
Logical One
Output Current
the drive unit have the
0.0 V to +0.4 V
40 mA (max.)
+2.4 V to +5.25 V
250 p.A (max.)
4-3. SIGNAL INTERFACE
The drive has 13 interface signals (see Table 6-1 for
pin assignments). Seven signals are input to the drive,
and six are output. Recommended interface circuitry
is shown in figure 4-2. The seven input signals are
listed below, and are described in 4-3-1.
DRIVE INPUT
MNEMONIC
DRIVE SELECT 0
SELECT 0
DRIVE SELECT 1
SELECT 1
DIRECTION SELECT
DIRTN
STEP
STEP
HEAD LOAD
HDLOAD
WRITE DATA
WRTDATA
WRITE GATE
WRTGATE
The five output signals are listed below, and are
described in 4-3-1.
DRIVE OUTPUT
INDEX
TRACKOO
WRITE PROTECT
READY
READ DATA
MNEMONIC
INDEX
TRKOO
WRTPRT
READY
RDDATA
4-3-1. Input Signal Descriptions
4-3-1-1. Drive Select 0, 1 - Logical 0 on th is line
selects the designated drive for operation.
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