®

17

PCM3002/3003

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

ML

MC

MD

FIGURE 10. Control Data Input Format.

MC Pulse Cycle Time

100ns (min)

MC Pulse Width LOW

40ns (min)

MC Pulse Width HIGH

40ns (min)

MD Setup Time

40ns (min)

MD Hold Time

40ns (min)

ML Low Level Time

40ns + 1SYSCLK (min)

ML High Level Time

40ns + 1SYSCLK (min)

ML Setup Time

40ns (min)

ML Hold Time

40ns (min)

ML

MC

MD

t

MLL

t

MLH

t

MCH

t

MCL

t

MDS

t

MCY

t

MLS

t

MLH

t

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

O

X

Loop-Back Control

ADC/DAC

O

X

Left Channel Attenuation

DAC

O

X

Right Channel Attenuation

DAC

O

X

Attenuation Control

DAC

O

X

Infinite Zero Detection

DAC

O

X

DAC Output Control

DAC

O

X

Soft Mute Control

DAC

O

X

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

DAC

O

O

ADC Power-Down Control

ADC

O

O

DAC Power-Down Control

DAC

O

O

High Pass Filter Operation

ADC

O

X

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.