WM8860 View Datasheet(PDF) - Wolfson Microelectronics plc

Part Name

Description

View to exact match

WM8860

Multi-Channel High Definition Audio CODEC

Wolfson Microelectronics plc 

Pre-Production

WM8860

Figure 6 Single Ended (Left) and Differential (Right) External Connections

Port-E supports presence detect. This can be read directly from the Pin Sense Verb.

If nothing is plugged into Port-E it is possible to use an automute function which will automatically

replace the samples in the stream with zeros, thus avoiding any noise being transmitted when there is

no input. This function can be enabled using the vendor-specific Auto-Mute Control Verb.

SET VERB BIT

7B0h

0

BITFIELD

NAME

PD_

AUTOMUTE

DEFAULT

0h

DESCRIPTION

Auto-Mute Control:

0 = Automute disabled

1 = Automute enabled

Note: When PD_AUTOMUTE=1 and

Presence Detect (bit 31 in verb F09h)=1 the

WM8860 will replace the samples in the

stream with zeros

PGA1 (NID = 0Ah)

Table 7 gives a summary of the PGA1 node:

NODE SUMMARY INFORMATION

NID

0Ch

Widget Type

Audio Selector

Supported Get Verbs

Bh, F00h, F02h, FB2h

Supported Set Verbs

3h, 7B2h, 7B3h

Unsolicited Responses

None

Vendor-Specific Verbs

FB2h, 7B2h, 7B3h : PGA Control

Table 7 PGA1 Node Summary Information

PGA1 provides analogue gain for the inputs to Port-E, allowing the signal level to be adjusted by up 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 of PGA1 is controlled using the Amplifier Gain/Mute Verb.

Note: When Port-E is configured in single-ended mode the actual gain settings applied to the signal

will be adjusted by a further −3.0dB. This changes the effective gain range to −15dB to +9dB.

w

PP, April 2011, Rev 3.2

37

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