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PCM3000E/2K データシート(PDF) 26 Page - Texas Instruments

部品番号 PCM3000E/2K
部品情報  18-BIT STEREO AUDIO CODEC, SINGLE-ENDED ANALOG INPUT/OUTPUT
PDF  44 Pages
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メーカー  TI2 [Texas Instruments]
ホームページ  https://www.ti.com
Logo TI2 - Texas Instruments

PCM3000E/2K データシート(HTML) 26 Page - Texas Instruments

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Within 1/fS
Normal Data
VCOM
(0.5 VCC2)
Undefined
Data
Normal Data
Synchronous
Asynchronous
Synchronous
Resynchronization
Synchronization Lost
DAC VOUT
State of Synchronization
T0020-04
Normal Data(1)
Zero Data
Normal Data
ADC DOUT
Undefined
Data
32/fS
Undefined
Data
22.2/fS
OPERATIONAL CONTROL
B8
B15
ML
MC
MD
B9
B10
B11
B12
B13
B14
B0
B7
B1
B2
B3
B4
B5
B6
T0023-01
PCM3000
PCM3001
SBAS055A – OCTOBER 2000 – REVISED OCTOBER 2004
(1)
The HPF transient response (exponentially attenuated signal from
±1.5% dc with 200-ms time constant) appears
initially.
Figure 28. DAC Output and ADC Output For Loss of Synchronization
The PCM3000 can be controlled in the software mode with a three-wire serial interface on MC (pin 25),
MD (pin 26), and ML (pin 27). Table 2 indicates selectable functions, and Figure 29 and Figure 30 illustrate
control data input format and timing. The PCM3001 only allows for control of data format.
Table 2. Selectable Functions
FUNCTION
ADC/DAC
DEFAULT (PCM3000)
Audio data format (7 selectable formats)
ADC/DAC
DAC: 16-bit, MSB-first, right-justified
ADC: 16-bit, MSB-first, left-justified
LRCIN polarity
ADC/DAC
Left/right = high/low
Loopback control
ADC/DAC
OFF
Left-channel attenuation
DAC
0 dB
Right-channel attenuation
DAC
0 dB
Attenuation control
DAC
Left channel and right channel = individual control
Infinite zero detection
DAC
OFF
DAC output control
DAC
Output enabled
Soft mute control
DAC
OFF
De-emphasis (OFF, 32 kHz, 44.1 kHz, 48 kHz)
DAC
OFF
Power-down control
ADC
OFF
High-pass filter operation
ADC
ON
Figure 29. Control Data Input Format
26



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