参数资料
型号: CS4299-JQZR
厂商: Cirrus Logic Inc
文件页数: 21/52页
文件大小: 0K
描述: IC CODEC AC 97 W/SRC 48-LQFP
标准包装: 2,000
系列: SoundFusion™
类型: 音频编解码器 '97
数据接口: 串行
分辨率(位): 18 b,20 b
ADC / DAC 数量: 1 / 1
三角积分调变:
动态范围,标准 ADC / DAC (db): 85 / 87
电压 - 电源,模拟: 4.75 V ~ 5.25 V
电压 - 电源,数字: 4.75 V ~ 5.25 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 带卷 (TR)
CS4299
28
4.14
Extended Audio ID Register (Index 28h)
ID[1:0]
Codec Configuration ID. When ID[1:0] = 00, the CS4297A is the primary audio codec. When
ID[1:0] = 01, 10, or 11, the CS4297A is a secondary audio codec. The state of the ID[1:0] bits
is determined at power-up from the ID[1:0]# pins.
AMAP
Audio Slot Mapping. The AMAP bit indicates whether the optional AC ’97 2.1 compliant AC-link
slot to audio DAC mapping is supported. This bit is a shadow of the AMAP bit in the AC Mode
Control Register (Index 5Eh). The PCM playback and capture slots are mapped according to
VRA
Variable Rate PCM Audio. The VRA bit indicates whether variable rate PCM audio is supported.
This bit always returns ‘1’, indicating that variable rate PCM audio is available.
Default
x201h. Where x is determined by the state of ID[1:0]# input pins. The Extended Audio ID Reg-
ister (Index 28h) is a read only register.
4.15
Extended Audio Status/Control Register (Index 2Ah)
VRA
Enable Variable Rate Audio. When ‘set’, the VRA bit allows access to the PCM Front DAC Rate
Register (Index 2Ch) and the PCM L/R ADC Rate Register (Index 32h). The bit must be ‘set’ in
order to use variable PCM playback or capture rates. The VRA bit also serves as a powerdown
for the DAC and ADC SRC blocks. Clearing VRA will reset the PCM Front DAC Rate Register
(Index 2Ch) and the PCM L/R ADC Rate Register (Index 32h) to their default values. The SRC
data path is flushed and the Slot Request bits for the currently active DAC slots will be fixed at
‘0’.
Default
0000h
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
ID1
ID0
0
00
0
AMAP
00
VRA
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
00
0
VRA
28
DS319PP6
CS4299
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