WM8850 datasheet(49/223 Pages) WOLFSON

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Pre-Production

WM8850

PP, April 2011, Rev 3.2

PORT-D (NID = 0Eh)

Table 16 gives a summary of the Port-D node:

NODE SUMMARY INFORMATION

NID

0Eh

Widget Type

Pin Complex

Supported Get Verbs

Bh, F00h, F07h, F1Ch

Supported Set Verbs

3h, 707h, 71Ch, 71Dh, 71Eh, 71Fh

Unsolicited Responses

None

Table 16 Port-D Node Summary Information

Port-D provides digital gain for the microphone(s) connected to DMICDAT1, allowing the signal level

to be adjusted by up to +32dB to −12dB in 0.5dB steps. Gain can be applied to left and right

channels independently if required. Additionally, a mute function is available – again this can be

applied to separate channels as required. The gain is controlled using the Amplifier Gain/Mute Verb.

There are no vendor-specific verbs associated with the Port-D node.

PORT-H (NID = 16H)

Table 17 gives a summary of the Port-H node:

NODE SUMMARY INFORMATION

NID

16h

Widget Type

Pin Complex

Supported Get Verbs

Bh, F00h, F02h, F07h, F1Ch, F73h

Supported Set Verbs

3h, 707h, 71Ch, 71Dh, 71Eh, 71Fh, 773h

Unsolicited Responses

None

Vendor-Specific Verbs

F73h, 773h : Internal Path Verb

Table 17 Port-H Node Summary Information

Port-H provides digital gain for the microphone(s) connected to DMICDAT2, allowing the signal level

to be adjusted by up to +32dB to −12dB in 0.5dB steps. Gain can be applied to left and right

channels independently if required. Additionally, a mute function is available – again this can be

applied to separate channels as required. The gain is controlled using the Amplifier Gain/Mute Verb.

Note that Port-H can also be used to provide a S/PDIF output. For details of the use of the node as a

S/PDIF output, see the “S/PDIF Transmit” section.

When Port-H is configured for S/PDIF output, it is possible to select either S/PDIF In or S/PDIF Tx 2

as the data source. The signal path is selected using vendor-specific Internal Path Verb.

SET VERB

BIT

BITFIELD

NAME

DEFAULT

DESCRIPTION

773h

7:0

Path Sel

17h

Selects the source of the Port-H node:

10h = S/PDIF In

17h = S/PDIF Tx2

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