參數(shù)資料
型號(hào)： LC78628E
廠商： Sanyo Electric Co.,Ltd.
元件分類： 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)： 18/40頁(yè)
文件大小： 241K
代理商： LC78628E
No. 6329-18/40
LC78628E
A12813
+
–
HFL
19
24
TGL
23
TOFF
29
JP–
28
JP+
T.Coil
20
Slip detection
High during the braking period
TES
T.E.
(THLD)
TES (when moving out)
TES (when moving in)
HFL
TOFF output
A12814
JP+
JP+
JP–
JP–
Two-value output
Three-value output
High-impedance output
A12815
The THLD signal is generated by the LA9230/40 and the tracking error signal is held during the JP pulse period.
* Tracking brake
The figure shows the relationships between the TES, HFL, and TOFF signals during the track jump c period. The
TOFF signal is extracted from the HFL signal by TES signal edges. When the HFL signal is high, the pickup is over
the mirror surface, and when low, the pickup is over pits region. Thus braking is applied based on the TOFF signal
being high when the pickup is moving from a mirror region to a pits region and on TOFF being low when the pickup
is moving from a data region to a mirror region in the increased gain state (TGL = low).
Code
Command
RES = low
$B6
JP three-value output
$B7
JP two-value output (earlier technique)
G
G
The JP three value output command allows the track jump operation to be controlled from a single pin. However, the spindle gain is 6 dB lower when this pin
is used, so applications must increase the gain in the servo system.
JP three-value output
相關(guān)PDF資料
PDF描述
LC78630 16-bit fixed point DSP with Flash
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