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| 型号： | TSC2300IPAG |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 63/81页 |
| 文件大小： | 1039K |
| 代理商： | TSC2300IPAG |
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TSC2300
SLAS372 — NOVEMBER 2002
TSC2300 AUDIO CONTROL REGISTERS
TSC2300 Audio Control Register (Page 2, Address 00H)
The audio control register of the TSC2300 controls the digital audio interface, the microphone preamp gain, the record
multiplexer settings, and the ADC highpass filter pole. This register determines which ADC high pass filter response is
selected, as well as which audio inputs are connected to the stereo ADC’s. The gain of the MIC input (0 to +12 dB) is
also selected. This register is also used to tell the data converters the frequency of MCLK, along with the frequency of
LRCLK (ADC and DAC sample rates). The format of the audio data is also selected.
The audio control register is formatted as follows:
BIT 15
BIT 14 BIT 13 BIT 12 BIT 11 BIT 10
BIT 9
BIT 8
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
MSB
LSB
HPF1
HPF0
INM1
INM0
RESV
MICG
MCLK
I2SFS
I2SF1
I2SF0
1
0
1
0
3
2
1
0
Bits [15:14] HPF1-HPF0
ADC High Pass Filter. These two bits select the pass-band for the high-pass filter or disable the filter. The default state
of the filter is enabled, with -3-dB frequency at 0.000019xFs.
Table 27. High-Pass Filter Operation
HPF[1:0]
HPF1
HPF0
DESCRIPTION
0
HPF Disabled, signal passes through unaltered
0
1
HPF -3-dB frequency=0.1xFs
1
0
HPF -3-dB frequency=0.000078xFs
1
HPF -3-dB frequency=0.000019xFs (default)
Bits [13:12] INM1-INM0
Audio ADC Input Multiplexer. These two bits select the analog input for the audio ADC. The input to the ADC can come
from the microphone input, right line input, left line input, or from a mono mix of the left and right line inputs. The
default input to the audio ADC is the microphone input.
Table 28. Audio ADC Input Selection
INM[1:0]
INM1
INM0
DESCRIPTION
0
ADC input=MIC (default)
0
1
ADC input=LLINEIN
1
0
ADC input=RLINEIN
1
ADC input=(RLINEIN+LLINEIN)/2
Bits [11:10] Reserved
Bits [9:8] MICG1-MICG0
Microphone Preamp Gain. These two bits select the gain of the microphone input channel. The gain of the microphone
input channel can be 0 dB, +6 dB, or +12 dB. The default gain of the microphone input channel is 0 dB.
Table 29. Microphone Input Gain Selection
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