WM8770 datasheet(42/52 Pages) WOLFSON

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WM8770

Production Data

PD Rev 4.1 June 2005

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

3:0

DMUTE[3:0]

0000

DAC Channel Soft Mute Enables:

0: mute disabled

1: mute enabled

MUTEALL

DAC Channel Master Soft Mute. Mutes all DAC channels:

0: mute disabled

1: mute enabled

10100

Mute Control

RECEN

REC Output Enable

0 : REC output muted

1: REC output enabled

3:0

DEEMP[3:0]

0000

De-emphasis Mode Select:

0 : Normal Mode

1: De-emphasis Mode

10101

DAC Control

7:4

DZFM[3:0]

0000

Selects the ouput for ZFLG1 and ZFLG2 pins (see Table 9).

1: indicates 1024 consecutive zero input samples on the

channels selected

0: indicates at least one of selected channels has non

zero sample in last 1024 inputs

1:0

FMT[1:0]

Interface Format Select

00: right justified mode

01: left justified mode

10: I

2S mode

11: DSP mode

ADCLRC/DACLRC Polarity or DSP Early/Late mode select

LRP

Left Justified / Right Justified /

0: Standard DACLRC Polarity

1: Inverted DACLRC Polarity

DSP Mode

0: Early DSP mode

1: Late DSP mode

BCP

BITCLK Polarity

0: Normal - DIN[3:0], DACLRC & ADCLRC sampled on

rising edge of BCLK; DOUT changes on falling edge of

BCLK.

1: Inverted - DIN[3:0], DACLRC & ADCLRC sampled on

falling edge of BCLK; DOUT changes on rising edge of

BCLK.

5:4

WL[1:0]

Input Word Length

00: 16-bit Mode

01: 20-bit Mode

10: 24-bit Mode

11: 32-bit Mode (not supported in right justified mode)

10110

Interface

Control

ADCHPD

ADC Highpass Filter Disable:

0: Highpass Filter enabled

1: Highpass Filter disabled

WM8770 Datasheet(PDF) 42 Page - Wolfson Microelectronics plc

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