STA310 datasheet(50/90 Pages) STMICROELECTRONICS

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STA310

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This register is used to set the value of the status bit in the IEC958 data stream.

SPDIF_REP_TIME

SPDIF repetition time of a pause frame

Address: 0x75

Type: R/W

Software Reset: NC

Hardware: Reset: UND

Description:

In compressed mode, a burst of pause frames is sent when there are no more data to transmit (due to an error

or a gap in the incoming bitstream, for example).

This register sets the size of a pause frame in IEC frames: Dolby Digital =4, MPEG=32 and DTS=3.

SPDIF_LATENCY

Latency value

Address: 0x7E

Type: R/W

Software Reset: NC

Hardware: Reset: UND

Description:

If bit LAT of register SPDIF_CONF is set, a delay can be configured between the output of IEC61937 in com-

pressed mode and the output of the audio decoder. To configure a latency (in unit of seconds) this register has

to be set according the following formula:

Value = L x FS/8 where, L=Latency in s and FS=Sampling frequency in Hz

Bitfield

Description

COM

Compress data bit.

1: compressed mode

0: non compressed mode.

COP

1: copy allowed

0: copy not allowed

PRE

1: output has pre-emphasis

0: output does not have pre-emphasis

SFR

0000: if sampling frequency = 44.1KHz

0010: if sampling frequency = 48KHz

0011: if sampling frequency = 32KHz

1010: if sampling frequency = 96KHz

321

Value

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