參數(shù)資料
型號(hào)： LC78621E
廠商： Sanyo Electric Co.,Ltd.
英文描述： Compact Disc Player DSP(用于CD播放器的8位DSP)
中文描述： 光碟機(jī)的DSP（用于光盤(pán)播放器的8位數(shù)字信號(hào)處理器）
文件頁(yè)數(shù)： 11/34頁(yè)
文件大?。?/td> 417K
代理商： LC78621E
Command noise rejection
This command reduces the noise on the CQCK clock signal. While this is effective for noise pulses shorter than
500 ns, the CQCK timings T
WL
, T
WH
, and t
setup
(see page 4 and 5, figure 1 and 2), must be set for at least 1 μs.
6. Focus Servo Circuit; Pin 16: FOCS, pin 17: FST, pin 18: FZD, pin 70: LASER
The FOCS, FST, and FZD pins are not required when the LC78621E is used in combination with the LA9230M or
the LA9231M. FZD should be tied low when these pins are not used. The LA9230M and LA9231M focus start
command is identical to the LC78621E FOCUS START #1 command.
NOTHING
This command can be used to initialize the LC78621E by inputting FE (hexadecimal). Note that 00 (hexadecimal)
is the reset command for the LA9230M and the LA9231M, and should be used with care since it clears the result
of the automatic adjustment process and returns these chips to their initial states.
Laser control
The LASER pin can be use as an extended output port.
Focus start
When the LC78621E is used in combination with the LA9230M or the LA9231M, the focus start operation is
executed completely on the servo side by commands form the control microprocessor. The following section
describes this operation when the LC78621E is used in combination with the LA9230M or the LA9231M.
When a focus start instruction (either FOCUS START #1 or FOCUS START #2) is input as a servo command,
first the charge on capacitor C1 is discharged by FST and the objective lens is lowered. Next, the capacitor is
charged by FOCS, and the lens is slowly raised. FZD falls when the lens reaches the focus point. When this signal
is received, FOCS is reset and the focus servo turns on. After sending the command, the microprocessor should
check the in-focus detection signal (the LA9210 DRF signal) to confirm focus before proceeding to the next part of
the program. If focus is not achieved by the time C1 is fully charged, the microprocessor should issue another
focus command and iterate the focus servo operation.
No. 5223-11/34
LC78621E
MSB
LSB
Command
RES = low
1 1 1 0 1 1 1 1
COMMAND INPUT NOISE REDUCTION MODE
1 1 1 0 1 1 1 0
RESET NOISE EXCLUSION MODE
G
G
MSB
LSB
Command
RES = low
0 0 0 0 1 0 0 0
FOCUS START #1
1 0 1 0 0 0 1 0
FOCUS START #2
0 0 0 0 1 0 1 0
LASER ON
1 0 0 0 1 0 1 0
LASER OFF
G
G
1 1 1 1 1 1 1 0
NOTHING
相關(guān)PDF資料
PDF描述
LC78622E Compact Disc Player DSP(用于CD播放器的8位DSP)
LC78622NE Compact Disc Player DSP(用于CD播放器的8位DSP)
LC78624E Compact Disc Player DSP(用于CD播放器的8位DSP)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC78622E 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP
LC78622NE 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP
LC78624E 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP
LC78625 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP
LC78625E 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Compact Disc Player DSP
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