WM9713L datasheet(21/133 Pages) CIRRUS

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WM9713L

Rev 4.0

AC'97

MCLKA

MCLKB

PCM

PLL

DIV 1-16

DIV 1-8

EXT[3:0] /

PLL[3:0] /

EXT[6:4] /

PLL[6:4] /

VOICE DAC

HIFI DSP

L/R ADCs

L/R DACs

AUX DAC

WM9713L

data bus

clock

VOICE DAC

CLOCK

AC97 CLK

HIFI CLK

CLK_MUX

MUX

CLKBX2

CLKAX2

SYSCLK

DIV 2

BCLK

DIV 1-16

AUX ADC

PENDIV

[2:0]

PCMCLK

AC-Link

Figure 10 Clocking Architecture for WM9713L

INTERNAL CLOCK FREQUENCIES

The internal clock frequencies are defined as follows (refer to Figure 10):



AC97 CLK

– nominally 24.576MHz, used to generate AC97 BITCLK at 12.288MHz



HIFI CLK

– for hi-fi playback at 48ks/s HIFI CLK = 24.576MHz. See Table 2 for voice only

playback.



Voice DAC CLK

– see Table 2 for sample rate vs clock frequency.

SAMPLE RATE

VOICE DAC CLK

FREQUENCY

HIFI CLK

FREQUENCY

8ks/s voice and hi-fi

2.048MHz

24.576MHz

8ks/s voice only (power save)

2.048MHz

4.096MHz

16ks/s voice and hi-fi

4.096MHz

24.576MHz

16ks/s voice only (power save)

4.096MHz

8.192MHz

32ks/s voice and hi-fi

8.192MHz

24.576MHz

48ks/s voice and hi-fi

12.288MHz

24.576MHz

Table 2 Clock Division Mode Table

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