WM8281ECSSLASHR datasheet(64/392 Pages) CIRRUS

64 / 392 page

WM8281

Rev 4.0

OUT6R output

OUT6L output

OUT5R output

OUT5L output

OUT4R output

OUT4L output

OUT3R output

OUT3L output

OUT2R output

OUT2L output

OUT1R output

OUT1L output

AIF3 TX2 output

AIF3 TX1 output

AIF3 RX1 (30h)

AIF3 RX2 (31h)

AIF1 TX8 output

AIF1 TX7 output

AIF1 TX6 output

AIF1 TX5 output

AIF1 TX4 output

AIF1 TX3 output

AIF1 TX2 output

AIF1 TX1 output

AIF1 RX3 (22h)

AIF1 RX4 (23h)

AIF1 RX5 (24h)

AIF1 RX6 (25h)

AIF1 RX7 (26h)

AIF1 RX8 (27h)

AIF1 RX1 (20h)

AIF1 RX2 (21h)

SLIMbus TX8 output

SLIMbus TX7 output

SLIMbus TX6 output

SLIMbus TX5 output

SLIMbus TX4 output

SLIMbus TX3 output

SLIMbus TX2 output

SLIMbus TX1 output

SLIMbus RX3 (3Ah)

SLIMbus RX4 (3Bh)

SLIMbus RX5 (3Ch)

SLIMbus RX6 (3Dh)

SLIMbus RX7 (3Eh)

SLIMbus RX8 (3Fh)

SLIMbus RX1 (38h)

SLIMbus RX2 (39h)

AIF2 TX6 output

AIF2 TX5 output

AIF2 TX4 output

AIF2 TX3 output

AIF2 TX2 output

AIF2 TX1 output

AIF2 RX3 (2Ch)

AIF2 RX4 (2Dh)

AIF2 RX5 (2Eh)

AIF2 RX6 (2Fh)

AIF2 RX1 (2Ah)

AIF2 RX2 (2Bh)

Figure 23 Digital Core - External Digital Interfaces

DIGITAL CORE MIXERS

The WM8281 provides an extensive digital mixing capability. The digital core signal processing blocks

and audio interface paths are illustrated in Figure 22 and Figure 23.

A 4-input digital mixer is associated with many of these functions, as illustrated. The digital mixer

circuit is identical in each instance, providing up to 4 selectable input sources, with independent

volume control on each input.

The control registers associated with the digital core signal paths are shown in Figure 24 through to

Figure 41. The full list of digital mixer control registers

is provided in the “Register Map” section

(Register R1600 through to R3000).

Further description of the associated control registers is provided below. Generic register definitions

are provided in Table 8.

The digital mixer input sources are selected using the associated *_SRCn registers; the volume

control is implemented via the associated *_VOLn registers.

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