參數(shù)資料
型號(hào)： LC78622E
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（用于光盤播放器的8位數(shù)字信號(hào)處理器）
文件頁(yè)數(shù)： 20/29頁(yè)
文件大?。?/td> 378K
代理商： LC78622E
No. 5480-20/29
LC78622E
Audio output level = 20 log
[dB]
For example, the formula below calculates the time required for the attenuation level to increase from 00H to EEH
when a 4STEP UP command is executed. Note that the control microprocessor must provide enough of a time
margin for this operation to complete before issuing the next attenuation level set command.
≈
21.6 ms
Note: Setting the attenuation level to values of EFH or higher is disallowed to prevent overflows in one-bit D/A
converter calculations from causing noise.
14. Mute Output; Pin 35: MUTEL, pin 42: MUTER
15. C2 Flag Output; Pin 30: C2F
C2F output flag information in 8-bit units.
16. Digital Output Circuit; Pin 31: DOUT
This is an output pin for use with a digital audio interface. Data is output in the EIAJ format. This signal has been
processed by the interpolation and muting circuits. This pin has a built-in driver circuit and can directly drive a
transformer.
The DOUT pin can be locked at the low level by issuing a DOUT OFF command.
The UBIT information in the DOUT data can be locked at zero by issuing a UBIT OFF command.
The DOUT data can be switched to data for which interpolation and muting processing have not been performed
by issuing a CD-ROM XA command.
17. Mute Control Circuit
Inputting the above command mutes the audio level (MUTE -
∞
dB). Since zero-cross muting is used, there is very
little noise associated with this operation. The IC defines zero cross to be the ranges where the upper 7 bits of the
data are all zeros or all ones. Note that the MUTE -12 dB instruction supported by the LC78620E has been removed
from this product.
238 level
×
4STEP UP
44.1 kHz
ATT DATA
MSB
LSB
Command
RES = low
G
G
0 1 0 0 0 0 1 0
DOUT ON
0 1 0 0 0 0 1 1
DOUT OFF
0 1 0 0 0 0 0 0
UBIT ON
G
G
0 1 0 0 0 0 0 1
UBIT OFF
1 0 0 0 1 0 0 0
CDROM-XA
1 0 0 0 1 0 1 1
ROMXA-RST
G
G
MSB
LSB
Command
RES = low
0 0 0 0 0 0 0 1
MUTE: 0 dB
MUTE: –
∞
dB
0 0 0 0 0 0 1 1
G
G
相關(guān)PDF資料
PDF描述
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)
LC78625E SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs
LC78625 SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs
LC78626KE Compact Disc Player DSP(用于CD播放器的8位DSP)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
LC78626 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:DSP for Compact Disk Players
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