PCM3000ESLASH2K.B datasheet(26/44 Pages) TI2

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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

B15

B10

B11

B12

B13

B14

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

Figure 29. Control Data Input Format

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