参数资料
型号: WLA49VVA
厂商: National Semiconductor Corporation
元件分类: ADC
英文描述: Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
中文描述: 音频子系统的双模单声道立体声耳机和扬声器放大器的高效率和多功能模数转换器
文件页数: 63/112页
文件大小: 5017K
代理商: WLA49VVA
12.0 Status & Control Registers (Continued)
12.31 AUDIO INTERFACE CONFIGURATION REGISTER
This register is used to control the configuration of the audio data interfaces.
TABLE 31. AUDIO_IF (0x19h)
Bits
Field
Description
1:0
AUDIO_IF_MODE
Selects the function of the 6 audio interface IOs.
AUDIO_IF_MODE
I2S_
CLK pin
I2S_
WS pin
I2S_
SDI pin
I2S_
SDO pin
GPIO_1
pin
GPIO_2
pin
00
2
I
2S
CLK
I
2S
WS
I
2S
SDI
I
2S
SDO
GPIO
1
GPIO
2
01
2
PCM
CLK
PCM
SYNC
-
PCM
SDO
GPIO
1
GPIO
2
10
2
PCM
CLK
PCM
SYNC
PCM
SDI
PCM
SDO
GPIO
1
GPIO
2
11
2
I
2S
CLK
I
2S
WS
I
2S
SDI
PCM
SDO
PCM
CLK
PCM
SYNC
2
I2S_WS_MS
If set the I
2S_WS is produced by the LM4935 and the I2S_WS pin will be an output.
3
I2S_CLK_MS
If set the I
2S_CLK is produced by the LM4935 and the I2S_CLK pin will be an output.
4
PCM_SYNC_MS
If set the PCM_SYNC is produced by the LM4935 and the relevant pin will be an output.
5
PCM_CLK_MS
If set the PCM_CLK is produced by the LM4935 and the relevant pin will be an output.
7:6
I2S_SDO_DATA
The two ADCs on the LM4935 can both be read via the isochronous I2S interface. The most recent
valid sample is output from the following source: (Please refer to the GPIO configuration register
(0x1Ah) for more information on SAR_CH_SEL)
I2S_SDO_DATA
LEFT
RIGHT
00
2
AUDIO ADC
SAR_CH_SEL
01
2
SAR VSAR 1
SAR_CH_SEL
10
2
SAR VSAR 2
SAR_CH_SEL
11
2
A_V
DD/2
SAR_CH_SEL
LM4935
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