參數(shù)資料
型號： LC78681E
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： QFP-64
文件頁數(shù)： 5/23頁
文件大?。?/td> 241K
代理商： LC78681E
2. Track Jump Commands
When a track jump command is issued to the servocontroller, an acceleration pulse is generated (a period), followed
by a deceleration pulse (b period) and braking (c period), completing the specified jump. TES and HFL input during
braking detects the direction of beam slippage, and the portion of the TE signal that compensates for slippage is cut
off by TOFF, which, together with boosting of the servo gain by TGL, supplements the destination track for the
jump.
Note: Of the disc motor control outputs, the TOFF pin is low in the CLV mode, and high in the Start Stop, and Brake
modes. TOFF can also be independently switched on or off by the microprocessor. However, disc motor control
is enabled only in the CLV mode.
No. 4521-13/23
LC78681E
MSB
LSB
Command
RES = low
1 0 1 0 0 0 0 0
Standard track jump
1 0 1 0 0 0 0 1
New track jump
0 0 0 1 0 0 0 1
1 TRACK JUMP IN #1
0 0 0 1 0 0 1 0
1 TRACK JUMP IN #2
0 0 1 1 0 0 0 1
1 TRACK JUMP IN #3
0 0 0 1 0 0 0 0
2 TRACK JUMP IN
0 0 0 1 0 0 1 1
4 TRACK JUMP IN
0 0 0 1 0 1 0 0
16 TRACK JUMP IN
0 0 1 1 0 0 0 0
32 TRACK JUMP IN
0 0 0 1 0 1 0 1
64 TRACK JUMP IN
0 0 0 1 0 1 1 1
128 TRACK JUMP IN
0 0 0 1 1 0 0 1
1 TRACK JUMP OUT #1
0 0 0 1 1 0 1 0
1 TRACK JUMP OUT #2
0 0 1 1 1 0 0 1
1 TRACK JUMP OUT #3
0 0 0 1 1 0 0 0
2 TRACK JUMP OUT
0 0 0 1 1 0 1 1
4 TRACK JUMP OUT
0 0 0 1 1 1 0 0
16 TRACK JUMP OUT
0 0 1 1 1 0 0 0
32 TRACK JUMP OUT
0 0 0 1 1 1 0 1
64 TRACK JUMP OUT
0 0 0 1 1 1 1 1
128 TRACK JUMP OUT
0 0 0 1 0 1 1 0
256 TRACK CHECK
0 0 0 0 1 1 1 1
TOFF
1 0 0 0 1 1 1 1
TON
1 0 0 0 1 1 0 0
TRACK JUMP BRAKE
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