PCM3003 datasheet(17/23 Pages) BURR-BROWN

17 / 23 page

PCM3002/3003

B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0

FIGURE 10. Control Data Input Format.

MC Pulse Cycle Time

tMCY

100ns (min)

MC Pulse Width LOW

tMCL

40ns (min)

MC Pulse Width HIGH

tMCH

40ns (min)

MD Setup Time

tMDS

40ns (min)

MD Hold Time

tMDH

40ns (min)

ML Low Level Time

tMLL

40ns + 1SYSCLK (min)

ML High Level Time

tMLH

40ns + 1SYSCLK (min)

ML Setup Time

tMLS

40ns (min)

ML Hold Time

tMLH

40ns (min)

SYSCLK: 1/256fS or 1/384fS or 1/512fS

MLL

MLH

MCH

MCL

MDS

MCY

MLS

MLH

MDH

LSB

FIGURE 11. Control Data Input Timing.

FUNCTION

ADC/DAC

PCM3002

PCM3003

Audio Data Format

ADC/DAC

4 Selectable Formats

2 Selectable Formats

LRCIN Polarity

ADC/DAC

Loop-Back Control

ADC/DAC

Left Channel Attenuation

DAC

Right Channel Attenuation

DAC

Attenuation Control

DAC

Infinite Zero Detection

DAC

DAC Output Control

DAC

Soft Mute Control

DAC

De-Emphasis (OFF, 32kHz, 44.1kHz, 48kHz)

DAC

ADC Power-Down Control

ADC

DAC Power-Down Control

DAC

High Pass Filter Operation

ADC

TABLE II. Selectable Functions (O = User Selectable; X = Not Available).

OPERATIONAL CONTROL

PCM3002 can be controlled in a software mode with a

three-wire serial interface on MC (pin 18), MD (pin 17), and

ML (pin 8). Table II indicates selectable functions, and

Figure 10 and 11 illustrate the control data input format and

timing. PCM3003 only allows for control of 16-/20-bit data

format, digital de-emphasis, and Power-Down Control by

hardware pins.

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