Sony OA-D30V - Write Data (WRTDATA); Write Gate (WRTGATE)

4-3-1-5. Write Data (WRTDATA) - This line is used
for data that is to be written on the disk. A transi-
tion from logical
one to logical zero changes the
polarity
of read/write head current and causes a data
bit to be written on the disk. This data line is active
when the WRTGATE
and READY signals are logical
zero, and
the WRTPRT signal is logical one.
DRIVE SELECT-----.
STEP-------.
~----_.t30msMIN.
WRITE GATE-------------....,
WRITE DATA ----------- .......... - ......
Figure 4-5. WRITE INITIATE TIMING
~---4.00 J.LS ± 40 ns---~
150 ns MIN.
1000
ns MAX.
Figure 4-6. WRITE DATA TIMING
4-3-1-6. Write Gate (WRTGATE) - This line defines
an operation
as read or write. Logical zero on this
line enables data
to be written on the disk; logical
one indentifies a read operation. And this line
controls
the tunnel erase head.
WRITE GATE--- __
9---,.....-----1. (~--------f
.... 522.0 J.Ls MIN.
ERASE ON - __ ...... 1.---1
254.0 J.LS MIN.
262.0 J.LS MAX.
J.-~f-----1~ .. 532.0 J.Ls MAX.
------~(~----------------~
Figure 4-7. ERASE ON AND OFF TIMING
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