Rainbow-electronics W90P710CDG Bedienungsanleitung PDF herunterladen (Seite 308)

100

101

W90P710CD/W90P710CDG

- 308 -

LRCLK

BCK

DATA

Left Right

123

MSB

LSB M SB

I2S bus

LRCLK

BCK

DATA

Left Right

123

MSB B2

M S B –Ju stified form at

MSB

LSB

Figure 6.11.2.2 The format of IIS

The sampling rate, bit shift clock frequency could be set by the control register ACTL_IISCON.

6.11.2 AC97 Interface

The AC97 interface, called AC-link is supported. For input and output direction, each frame contains a

Tag slot and 12 data slots. However, in the 12 data slots, only 4 slots are used in W90P710, other 8

slots are not supported, and the control data and audio data are transferred in the 4 valid slots. Each

slot contains 20 bits data.

The interface signals are shown as Figure 6.11.2.1

Figure 6.11.2.1 The interface signal of AC-link

Audio

Controller

Audio

Codec

SYNC

BCLK

DIN

DOUT

RESETB

1 2 ... 303 304 305 306 307 308 309 310 311 312 313 ... 551 552

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