WM8805 datasheet(35/66 Pages) CIRRUS

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Production Data

WM8805

PD, Rev 4.5, March 2009

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R29

SPDRX1

1Ch

SPDGPO

RX4-7 Configuration Select

When set high the pin is a GPO pin.

0 – S/PDIF inputs

1 – GPO outputs

WL_MASK

S/PDIF Receiver Word Length Truncation Mask

0 = disabled, data word is truncated as described in

Table 44.

1 = enabled, data word is not truncated.

SPD_192K_EN

S/PDIF Receiver 192kHz Support Enable

0 = disabled, S/PDIF receiver maximum supported

sampling frequency is 96kHz

1 = enabled, S/PDIF receiver maximum supported

sampling frequency is 192kHz

R30

PWRDN

1Eh

SPDIFRXPD

S/PDIF Receiver Powerdown

0 = S/PDIF receiver enabled

1 = S/PDIF receiver disabled

PLL6

08h

2:0

RXINSEL[2:0]

000

S/PDIF Rx Input Select

Select the S/PDIF input to pass to the receiver

circuit.

000 – RX0

001 – RX1

010 – RX2

011 – RX3

100 – RX4

101 – RX5

110 – RX6

111 – RX7

SPDMODE

09h

7:0

SPDIFINMODE

11111111

S/PDIF Input Mode Select

Selects the input circuit type for the receiver input.

The LSB represents RX0 and the MSB represents

RX7

0 = CMOS input

1 = Comparator input. Compatible with 500mVppAC

coupled consumer S/PDIF input signals. Refer to

S/PDIF specification (IEC 60958-3) for full details.

Table 39 S/PDIF Receiver Input Selection Registers

AUDIO DATA HANDLING

The S/PDIF receiver recovers the data and VUCP bits from each sub-frame. The WM8805 can

detect when the data is not in PCM format. See Non-Audio Detection section for more detail.

The received data can also be output over the audio interfaces in any of the data formats supported,

or data may also be re-transmitted on TX0, de-jittering the data stream.

USER DATA

The WM8805 can output recovered user data via the GPO pins. See Table 52 for General Purpose

Pin control.

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