參數(shù)資料
型號: CXD2508AR
廠商: Sony Corporation
元件分類: 數(shù)字信號處理
英文描述: CD Digital Signal Processor
中文描述: CD數(shù)字信號處理器
文件頁數(shù): 16/49頁
文件大小: 858K
代理商: CXD2508AR
– 16 –
CXD2508AQ/AR
The attenuation data consists of seven bits (AD6 to AC0), and 127 settings are possible.
Audio output from 01
(H)
to 7E
(H)
is determined according to the following formula:
Audio output = 20 log ( ) dB
Ex.) When the attenuation data is 7A
(H)
Audio output=20 log ( ) dB = –0.417dB
Soft Mute
With soft mute function, when the attenuation data goes from 7F
(H)
(0dB) to 00
(H)
(–
) or vice versa, muting is
turned on/off with a muting time of 1024/Fs [s] = 23.2 [ms] (Fs = 44.1kHz).
Command
Data 1
Audio CTRL
0
0
Mute
ATT
D3
D2
D1
D0
Data 2
DADS
D3
D2
D1
D0
Command bit
Mute = 0
Mute = 1
Mute off.
Mute on. 0 data is output
from DSP.
Meaning
Command bit
ATT = 0
ATT = 1
Attenuation off.
–12dB
Meaning
Command bit
DADS = 0
DADS = 1
Normal-speed playback for DAC block
Double-speed playback for DAC block
Processing
Command
Command bit
AD6 to AD0
7F
(H)
7E
(H)
to
01
(H)
00
(H)
Audio output
0dB
–0.13dB
to
–42.144dB
Data 3
Audio CTRL
AD6
AD5
AD4
D2
D1
D0
Data 4
AD3
AD2
AD1
AD0
D3
D2
D1
D0
attenuation data
128
122
128
$AX commands
In the case of using the crystal of 768Fs (Fs = 44.1kHz)
Digital Attenuation
The audio output level from DAC can be attenuated by setting AD6 to AC0 of register A. (with a built-in primary
noise shaper)
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