WM8580GEFV datasheet(61/92 Pages) WOLFSON

61 / 92 page

Product Preview

WM8580

PP Rev 1.0 March 2006

STATUS FLAGS

There are several status flags generated by the S/PDIF Receiver, described below.

FLAG

DESCRIPTION

VISIBILITY

UNLOCK

Indicates that the S/PDIF Clock Recovery circuit is unlocked, or the

incoming S/PDIF signal is not present.

0 = Locked onto incoming S/PDIF stream.

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

is not present.

S/PDIF Status

pins, SWMODE pin

(when in hardware

mode)

INVALID

Indicates that recovered S/PDIF data is marked as invalid.

0 = Data marked as valid

1 = Data marked as invalid

Interrupt Status

TRANS_ERR

Indicates that recovered S/PDIF frame has parity errors or bi-phase

encoding errors, or that sub-frames were recovered out of

sequence

0 = No data errors or bi-phase encoding errors detected and sub-

frame sequence correct

1 = Data errors or bi-phase encoding errors detected or subframe

sequence incorrect (missing preamble)

Interrupt Status

AUDIO_N

Recovered Channel Status bit-1.

0 = Data word represents audio PCM samples.

1 = Data word does not represent audio PCM samples.

Channel Status

Status Register

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.

S/PDIF Status

CPY_N

Recovered Channel Status bit-2 (active low)

0 = Copyright is asserted for this data.

1 = Copyright is not asserted for this data.

Channel Status

Status Register,

GPO pins

DEEMPH

Recovered Channel Status bit-3

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

1 = Recovered S/PDIF data has pre-emphasis

Channel Status

Status Register,

GPO pins

REC_FREQ[1:0]

Indicates recovered S/PDIF sample rate.

00 = 192kHz

01 = 96kHz / 88.2kHz

10 = 48kHz / 44.1kHz

11 = 32kHz

S/PDIF Status

INTB

Interrupt signal (see section Interrupt Generation)

GPO pins

Recovered validity-bit for current sub-frame

GPO pins

Recovered user-bit for current sub-frame

GPO pins

Recovered channel-bit for current sub-frame

GPO pins

Recovered parity-bit for current sub-frame

GPO pins

SFRM_CLK

Indicates current sub-frame:

1 = Sub-frame A

0 = Sub-frame B

GPO pins

192BLK

Indicates start of 192 frame-block. High for duration of frame-0.

GPO pins

CSUD

Indicates that the 192 frame-block of channel status data has

updated.

GPO pins

REC_FREQ192

Indicates that the recovered S/PDIF clock frequency is 192kHz

GPO pins

ZFLAG

Indicates ‘zero-detection’ in DACs. See page 45 for more details

MUTE pin, GPO

pins

NON_AUDIO

Logical OR of PCM_N and AUDIO_N

GPO pins, SDO pin

(when in hardware

mode)

Table 60 Status Flag Description

WM8580GEFV bảng dữ liệu(PDF) 61 Page - Wolfson Microelectronics plc

WM8580GEFV bảng dữ liệu(HTML) 61 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

bảng dữ liệu tải về

Link URL