WM8850 datasheet(119/223 Pages) WOLFSON

119 / 223 page

Pre-Production

WM8850

PP, April 2011, Rev 3.2

119

00h

01h

02h

03h

04h

05h

06h

07h

08h

09h

0Ah

0Bh

0Ch

0Dh

0Eh

0Fh

10h

11h

12h

13h

14h

15h

16h

17h

OVERWRITE CONTROL VERB (VENDOR-SPECIFIC)

Verb ID

Payload [7:0]

Response[31:0]

Get

F93h

00h

Bits [31:0] in the table below

Set

793h

Bits [7:0] in the table below

00000000h

Bit

Bitfield Name

Default

Description

[31:3]

Rsvd

0000000h

Reserved

[2]

NA_CNTRL

Controls the conditions under which the non audio flag is asserted:

0 = non-audio flag asserted when the non-audio code (defined in IEC-

61937) is detected. Non-audio flag rescinds after 4096 S/PDIF frames

without non-audio code being present.

1 = as above, but Channel Status Bit [1] (/AUDIO) must also be set to 1

for the non-audio flag to assert. Non-audio flag rescinds in the same way

as above, and in addition the flag will rescind immediately if /AUDIO were

to go low.

[1]

NA_OVWR_EN

If a Non-Audio Flag is asserted then sample data is overwritten with zeros

when this bit is set:

0 = no overwrite

1 = overwrite samples with zeros

Note: When in Software Formatted S/PDIF Mode, only the 24-bit payload

can be overwritten.

Note: When SRC1 is used (i.e. Processing State is 01h), NA_OVWR_EN

is set to 1 by the WM8850

[0]

DE_OVWR_EN

If a DATA_ERR is detected, the sample is overwritten with zeros when

this bit is set:

0 = Let erroneous sample pass

1 = overwrite erroneous sample with zeros

Note: When in Software Formatted S/PDIF Mode, all 32-bits of the

stream sample are overwritten.

WM8850 Datasheet(PDF) 119 Page - Wolfson Microelectronics plc

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