WM1811A datasheet(53/328 Pages) WOLFSON

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Production Data

WM1811A

PD, November 2013, Rev 4.1

DMICCLK pin

DMICDAT pin

(Left & Right

channels interleaved)

Left Mic output

Right Mic output

hi-Z

Figure 16 Digital Microphone Interface Timing

The digital microphone channels can be routed to the AIF1 digital audio interface output paths.

Digital volume control of the digital microphone channels in the AIF1 signal paths is provided using

the registers described in the “Digital Volume and Filter Control” section.

The digital microphone channels can also be routed, in a limited number of configurations, to the

digital mixing output bus, via the digital sidetone signal paths. See “Digital Mixing” for further details.

Digital volume control of the digital microphone channels in the digital sidetone signal paths is

provided using the registers described in the “Digital Mixing” section.

The digital microphone interface control fields are described in Table 9.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R4 (0004h)

Power

Management

(4)

DMIC1L_ENA

Digital microphone (DMICDAT)

Left channel enable

0 = Disabled

1 = Enabled

DMIC1R_ENA

Digital microphone (DMICDAT)

Right channel enable

0 = Disabled

1 = Enabled

Table 9 Digital Microphone Interface Control

WM1811A Datasheet(PDF) 53 Page - Wolfson Microelectronics plc