WM8860 View Datasheet(PDF) - Wolfson Microelectronics plc

Part Name

Description

View to exact match

WM8860

Multi-Channel High Definition Audio CODEC

Wolfson Microelectronics plc 

WM8860

Pre-Production

Regardless of the type of input, the sample rate and word length of the data captured by the MIC1

node is set using the Stream Format Verb. Table 15 below shows the required settings for Base, Mult

and Div as part of the Stream Format Verb to obtain the required sample rate.

When a digital microphone is being used, the DMICCLK output frequency will be set according to the

Stream Format Verb. See “Digital Microphone Record” for details of the DMICCLK frequency.

SAMPLE RATE

BASE

MULT[2:0]

8kHz

0h

0h

11.025kHz

1h

0h

16kHz

0h

0h

22.05kHz

1h

0h

32kHz

0h

1h

44.1kHz

1h

0h

48kHz

0h

0h

Table 15 MIC1 Supported Sample Rate Settings

DIV[2:0]

5h

3h

2h

1h

2h

0h

0h

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

The MIC1 output data is by default set to provide the captured waveform from the left channel in

Channel 0, and the right channel in Channel 1. It is possible to adjust this mapping using the vendor-

specific Channel Copy Verb.

SET VERB BIT

7B1h

1

0

BITFIELD

NAME

CHAN1_

SEL

CHAN0_

SEL

DEFAULT

DESCRIPTION

1

Channel 1 (right) Mapping Control:

0 = Channel 1 takes data from left audio

channel

1 = Channel 1 takes data from right audio

channel

0

Channel 0 (left) Mapping Control:

0 = Channel 0 takes data from left audio

channel

1 = Channel 0 takes data from right audio

channel

w

PP, April 2011, Rev 3.2

44

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