參數(shù)資料
型號(hào)： LC78628
廠商： Sanyo Electric Co.,Ltd.
元件分類(lèi)： 數(shù)字信號(hào)處理
英文描述： 16-bit fixed point DSP with Flash
中文描述： 具有閃存的 16 位定點(diǎn) DSP
文件頁(yè)數(shù)： 16/40頁(yè)
文件大?。?/td> 241K
代理商： LC78628
No. 6329-16/40
LC78628E
Code
Command
RES = low
$A0
Previous Track Jump Mode
G
G
$A1
New Track Jump Mode
$11
1 TRACK JUMP IN #1
$12
1 TRACK JUMP IN #2
$31
1 TRACK JUMP IN #3
$52
1 TRACK JUMP IN #4
$10
2 TRACK JUMP IN
$13
4 TRACK JUMP IN
$14
16 TRACK JUMP IN
$30
32 TRACK JUMP IN
$15
64 TRACK JUMP IN
$17
128 TRACK JUMP IN
$19
1 TRACK JUMP OUT #1
$1A
1 TRACK JUMP OUT #2
$39
1 TRACK JUMP OUT #3
$5A
1 TRACK JUMP OUT #4
$18
2 TRACK JUMP OUT
$1B
4 TRACK JUMP OUT
$1C
16 TRACK JUMP OUT
$38
32 TRACK JUMP OUT
$1D
64 TRACK JUMP OUT
$1F
128 TRACK JUMP OUT
$16
256 TRACK CHECK
$0F
TOFF
$8F
TON
G
G
$8C
TRACK JUMP BRAKE
$21
JP pulse period TOFF output mode
$20
Reset the JP pulse period TOFF output mode
G
G
Track jump commands
c
b
a
JP–(+)
JP+(–)
(Braking period)
(JP pulse width)
TGL
A12812
When the LC78628E receives a track jump instruction as a servo command, it first generates accelerating pulses (period
a) and next generates deceleration pulses (period b). The passage of the braking period (period c) completes the specified
jump. During the braking period, the LC78628E detects the beam slip direction from the TES and HFL inputs. TOFF is
used to cut the components in the TES signal that aggravate slip. The jump destination track is captured by increasing the
servo gain with TGL. In JP pulse period TOFF output mode, TOFF goes high during the period that JP pulses are
generated.
Note: Of the modes related to disc motor control, the TOFF pin goes low only in CLV mode, and will be high during
start, stop, and brake operations. Note that the TOFF pin can be turned on and off independently by microprocessor
issued commands. However, this function is valid only when disc motor control is in CLV mode.
相關(guān)PDF資料
PDF描述
LC78628E 16-bit fixed point DSP with Flash
LC78630 16-bit fixed point DSP with Flash
LC78630E 16-bit fixed point DSP with Flash
LC78631 16-bit fixed point DSP with Flash
LC78631E 16-bit fixed point DSP with Flash
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