參數(shù)資料
型號(hào)： TLV320AIC27CPFB
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： PLASTIC, TQFP-48
文件頁(yè)數(shù)： 27/54頁(yè)
文件大?。?/td> 732K
代理商： TLV320AIC27CPFB
TLV320AIC27
STEREO AUDIO CODEC
SLAS253A – MARCH 2000 – REVISED SEPTEMBER 2000
33
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
register 28h – extended audio ID (continued)
Table 17. Extended Audio ID Register
DATA BIT
FUNCTION
ANY MODE BUT 10
MODE 10
VRA
Variable rate audio support
1
DRA
Double rate audio support
0
VRM
Variable rate mic ADC support
0
CDAC
Center DAC support
0 (unless I2S = 1)
1 when ID = 11 or I2S = 1
SDAC
Surround DAC support
0 (unless I2S = 1)
1
LDAC
LFE DAC support
0 (unless I2S = 1)
1 when ID = 11 or I2S = 1
AMAP
Slot to front DAC mapping support
1
ID1
Codec configuration – pin 45 value
Inverse of level at pin 45
ID0
Codec configuration – pin 46 value
Inverse of level at pin 46
register 2Ah – extended audio status and control register
The extended audio status and control register is a read/write register that provides status and control of the
extended audio features.
Table 18. Extended Audio Status and Control Register
DATA BIT
FUNCTION
READ/WRITE
TLV320AIC27
SUPPORT
VRA
Enables variable rate audio mode
Read/write
Yes
DRA
Enable double rate audio mode
Read/write
No
VRM
Enables variable rate mic ADC
Read/write
No
CDAC
Indicates center DAC ready
Read
Yes
SDAC
Indicates surround DAC ready
Read
Yes
LDAC
Indicates LFE DAC ready
Read
Yes
MADC
Indicates mic ADC ready
Read
No
PRI
Set to turn off center DAC
Read/write
Enable only
PRJ
Set to turn off surround DACs
Read/write
Enable only
PRK
Set to turn off LFE DACs
Read/write
Enable only
PRL
Set to turn off mic ADC
Read/write
No
register 2Ch to 32h – audio sample rate control registers
These registers are read/write registers—writing to this registers is done to select alternative sample rates for
the audio PCM converters. The default rate is 48 ksps. Note that only Revision 2.1-recommended rates are
supported by the TLV320AIC27; selection of any other unsupported rates causes the rate to default to the
nearest supported rate, and the supported rate value to be latched and therefore, read back.
Register 2Ch is the front DAC rate register, but it is also used for center channel data rate.
I2S mode only supports 48 ksps rates, not variable rates.
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