WM8850GEFLSLASHV datasheet(52/223 Pages) WOLFSON

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WM8850

Pre-Production

PP, April 2011, Rev 3.2

SAMPLE RATE

BASE

MULT

DIV

8kHz

11.025kHz

16kHz

22.05kHz

24kHz

32kHz

44.1kHz

48kHz

88.2kHz

96kHz

176.4kHz

192kHz

Table 21 DAC1 Supported Sample Rate Settings

Note: Other settings of Base, Mult and Div are reserved and should not be set.

DAC1 provides digital gain, allowing the signal level to be adjusted between 0dB and −63.5dB in

0.5dB steps. Gain can be applied to left and right channels independently if required. Additionally, a

digital softmute function is available – again this can be applied to separate channels as required.

The gain of DAC1 is controlled using the Amplifier Gain/Mute Verb.

Note: When Port-A is configured to drive headphones (H-Phn Enable = 1) the actual gain settings

applied will be adjusted by a further −8.0dB. This changes the effective gain range to −71.5dB to

−8.0dB.

Under default conditions, the DAC1 node will process data received from the HDA interface. It is also

possible to select S/PDIF Rx as the data source, using the vendor-specific Internal Path Verb.

Note that, when the S/PDIF Rx node is selected as the input to any of DAC1, DAC2 or DAC3, the

Internal Path Verbs in all the other DAC nodes are updated to use the S/PDIF Rx node also. It is not

possible to route the HDA Link to any DAC at the same time as routing the S/PDIF Rx node to

another DAC.

When the S/PDIF Rx node is selected as the input to the DAC nodes, the Stream Format Verb for

each DAC node becomes read-only and is set according to the settings in the S/PDIF Rx node.

SET VERB

BIT

BITFIELD

NAME

DEFAULT

DESCRIPTION

773h

7:0

Path Sel

00h

Selects source of DAC1 node:

00h = DAC1 takes data from HDA Link

05h = DAC1 takes data from S/PDIF Rx

All other values of Path Sel are reserved.

Note: When using the Internal Path Verb to use S/PDIF Rx as the data source of DAC1 it is

recommended that the S/PDIF Rx node (NID=05h) is enabled after setting Path Sel=05h. Failure to

do so may result in a one sample delay between left and right channels.

WM8850GEFL/V Datasheet(PDF) 52 Page - Wolfson Microelectronics plc

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