PCM3060PWR datasheet(24/45 Pages) BURR-BROWN

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MODE CONTROL

PARALLEL HARDWARE CONTROL

3-WIRE (SPI) SERIAL CONTROL

PCM3060

SLAS533 – MARCH 2007

The PCM3060 supports the following three types of mode control interface and four types of operation

configuration, according to the input state of MODE (pin 28) as follows. The pullup or pulldown resistor must be

220 k

Ω± 5%.

MODE

MODE CONTROL INTERFACE

Tie to DGND

2-wire (I2C) serial control, selectable VOUTX configuration

Pulldown resistor to DGND

3-wire parallel control, differential VOUTX

Pullup resistor to VDD

3-wire parallel control, single-ended VOUTX

Tie to VDD

3-wire (SPI) serial control, selectable VOUTX configuration

The input state of the MODE pin is sampled during power-on reset or external reset; therefore, an input change

after reset is ignored until the next reset is performed.

The definitions (assignments) of the following three pins are changed by this control mode setting.

DEFINITION

SPI

I2C

H/W

SDA

DEMP

SCL

FMT

ADR

IFMD

In serial mode control, the actual mode control is performed by register write (and read) through an SPI- or

I2C-compatible serial control port.

In parallel mode control, three specific functions are controlled directly through high/low settings of three specific

pins.

IFMD (Interface Mode)

DESCRIPTION

LOW

Slave mode for ADC, slave mode for DAC

HIGH

Master (256 fS) mode for ADC, slave mode for DAC

The audio interface of the ADC and DAC can be independent from each other, but mode selection is applied on

both.

FMT (Interface Format)

DESCRIPTION

LOW

24-bit I2S for ADC and DAC

HIGH

24-bit left-justified for ADC and DAC

The audio interface of the ADC and DAC can be independent from each other, but format selection is applied on

both.

DEMP (De-emphasis)

DESCRIPTION

LOW

De-emphasis off

HIGH

De-emphasis on (1)

(1)

The 44.1-kHz de-emphasis filter is always selected.

The PCM3060 supports SPI-compatible serial ports, which operate asynchronously to the audio serial interface.

The control interface consists of MD, MC, and MS. MD is the serial data input, used to program the mode

control registers. MC is the serial bit clock, used to shift the data into the control port. MS is the select input,

used to enable the mode control port.

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