參數(shù)資料
型號(hào)： CDB4220
廠商： Cirrus Logic, Inc.
元件分類： Codec
英文描述： 24-Bit Stereo Audio Codec with 3V Interface
中文描述： 24位立體聲音頻編解碼器接口為3V
文件頁(yè)數(shù)： 15/32頁(yè)
文件大小： 770K
代理商： CDB4220
CS4220 CS4221
DS284PP3
15
5.2.4
SOFT RAMP STEP RATE (RMP)
Default = 00
00 - 1 step per 8 LRCK’s
01 - 1 step per 4 LRCK’s
10 - 1 step per 16 LRCK’s
11 - 1 step per 32 LRCK’s
Function:
The rate of change for the Soft Ramp function is adjustable through the RMP bits.
5.3
Left Channel Output Attenuator Level (address 03h)
5.4
Right Channel Output Attenuator Level (address 04h)
5.4.1
ATTENUATION LEVEL (ATT7-ATT0)
Default = 00h
Function:
The Output Attenuator Level registers allow for attenuation of the DAC outputs in 0.5 dB increments
from 0 to 113.5 dB. Level changes are implemented with an analog volume control until the residual
output noise is equal to the noise floor in the mute state. At this point, volume changes are performed
digitally. This technique is superior to purely digital volume control because the noise is attenuated
by the same amount as the signal, thus preserving dynamic range, see Figure 16. Volume changes
are performed as dictated by the SOFT bit in the DAC Control register. ATT0 represents 0.5 dB of
attenuation and settings greater than 227 (decimal value) will mute the selected DAC output.
7
6
5
4
3
2
1
0
ATT7
0
ATT6
0
ATT5
0
ATT4
0
ATT3
0
ATT2
0
ATT1
0
ATT0
0
Binary Code
00000000
11100011
11100100
Decimal Value
0
227
228
Volume Setting
0 dB
-113.5 dB
Muted
Table 1. Example Volume Settings
相關(guān)PDF資料
PDF描述
CDB4221 24-Bit Stereo Audio Codec with 3V Interface
CDB4222 20-Bit Stereo Audio Codec with Volume Control
CDB4224 24-Bit 105 dB Audio Codec with Volume Control
CDB4223 24-Bit 105 dB Audio Codec with Volume Control
CDB4225 Digital Audio Conversion System
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDB4221 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit Stereo Audio Codec with 3V Interface
CDB4222 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:20-Bit Stereo Audio Codec with Volume Control
CDB4223 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit 105 dB Audio Codec with Volume Control
CDB4224 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit 105 dB Audio Codec with Volume Control
CDB4225 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Digital Audio Conversion System
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