Sony OA-D30V - Write Protect (WRTPRT); Ready; Read Data (RDDATA)

4-3-2-3. Write Protect (WRTPRT) - This line indi-
cates a disk is write protected. Logical zero on this
line indicates a write
protected disk is inserted in
the drive. Logical one on this line indicates data
may be written on the disk. If no disk is inserted
in
the drive logical zero appears on this line. If the
drive is not selected this line is logical one.
4-3-2-4. Ready
This line
is logical zero when
a) disk is inserted
and
b) motor is rotating
and
c) drive unit is selected.
At all other times this line is logical one.
4-3-2-5. Read Data (RDDATA)
This line provides unseparated data (data and clock
combined). The line is normally logical one, and
becomes logical zero when
data is read.
DRIVE SELECT--,L._-+ ______________ -i
I (~(---------------------------
).1
STEP------t
~--------------------_i~(---------------------------
:/
WR ITE GA TE--------+------------------.
30 ms MIN.
VALID READ DATA-----...i------I
Figure 4-11. READ INITIATE TIMING
~--4.00 /lS NOM-----.
330 ns ± 50 ns
2.00/ls NOM
Figure 4-12. READ DATA TIMING
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