WM8580 datasheet(65/97 Pages) WOLFSON

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Production Data

WM8580

PD Rev 4.3 August 2007

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

AUDIO_N

Linear PCM Identification

0 = Data word represents audio PCM samples.

1 = Data word does not represent audio PCM samples.

PCM_N

Indicates that non-audio code (defined in IEC-61937)

has been detected.

0 = Sync code not detected.

1 = Sync code detected – received data is not audio

PCM.

CPY_N

Recovered Channel Status bit-2 (active low).

0 = Copyright is asserted for this data.

1 = Copyright is not asserted for this data.

DEEMPH

Recovered Channel Status bit-3

0 = Recovered S/PDIF data has no pre-emphasis.

1 = Recovered S/PDIF data has pre-emphasis

5:4

REC_FREQ

[1:0]

Indicates recovered S/PDIF clock frequency:

00 = Invalid

01 = 96kHz / 88.2kHz

10 = 48kHz / 44.1kHz

11 = 32kHz

R49

SPDSTAT

31h

(read-only)

UNLOCK

Indicates that the S/PDIF Clock Recovery circuit is

unlocked or that the input S/PDIF signal is not present.

0 = Locked onto incoming S/PDIF stream.

1 = Not locked to the incoming S/PDIF stream or the

incoming S/PDIF stream is not present.

Table 63 S/PDIF Status Register

The interrupt and update signals used to generate INT_N can be masked as necessary. The MASK

(R43). Masked flags update the S/PDIF Status Register (R49).

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R37

INTMASK

25h

8:0

MASK[8:0]

000000000

When a flag is masked, it does not update the Interrupt

Status Register or assert INT_N.

0 = unmask, 1 = mask.

MASK[0] = mask control for UPD_UNLOCK

MASK[1] = mask control for INT_INVALID

MASK[2] = mask control for INT_CSUD

MASK[3] = mask control for INT_TRANS_ERR

MASK[4] = mask control for UPD_AUDIO_N

MASK[5] = mask control for UPD_PCM_N

MASK[6] = mask control for UPD_CPY_N

MASK[7] = mask control for UPD_DEEMPH

MASK[8] = mask control for UPD_REC_FREQ

Table 64 Interrupt Mask Control Register

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