Write Data (Wrtdata); Write Gate (Wrtgate) - Sony OA-D30V Manual

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 G A T E - - - - - - - - - - - - - . . . . ,
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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