WM8580 datasheet(77/97 Pages) WOLFSON

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Production Data

WM8580

PD Rev 4.3 August 2007

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

PLLB 1

04h

8:0

PLLB_K[8:0]

100100001

PLLB 2

05h

8:0

PLLB_K[17:9]

101111110

3:0

PLLB_K[21:18]

1101

Fractional (K) part of PLLB frequency ratio (R).

Value K is one 22-digit binary number spread over registers R4,

R5 and R6 as shown.

Note: PLLB_K must be set to specific values when the S/PDIF

receiver is used. Refer to S/PDIF Receive Mode Clocking

section for details.

PLLB 3

06h

7:4

PLLB_N[3:0]

0111

Integer (N) part of PLLB frequency ratio (R).

Use values in the range 5 ≤ PLLB_N ≤ 13 as close as possible to

Note: PLLB_N must be set to specific values when the S/PDIF

receiver is used. Refer to S/PDIF Receive Mode Clocking

section for details.

PRESCALE_B

PLL Pre-scale Divider Select

0 = Divide by 1 (PLL input clock = oscillator clock)

1 = Divide by 2 (PLL input clock = oscillator clock

÷ 2)

Note: PRESCALE_A must be set to the same value as

PRESCALE_B in PLL S/PDIF receiver mode.

POSTSCALE_B

PLL Post-scale Divider Select

PLL S/PDIF Receiver Mode

POSTSCALE_A is used to configure a 256fs or 128fs PLLACLK,

POSTSCALE_B is not used. Refer to Table 45.

PLL User Mode

Used in conjunction with the FREQMODE_x bits. Refer to Table

44.

4:3

FREQMODE_B

[1:0]

PLL Output Divider Select

PLL S/PDIF Receiver Mode

FREQMODE_A is automatically controlled. FREQMODE_B is not

used.

PLL User Mode

Used in conjunction with the POSTSCALE_x bits. Refer to Table

44.

6:5

MCLKOUTSRC

MCLK pin output source

00 = Input – Source MCLK pin

01 = Output – Source PLLACLK

10 = Output – Source PLLBCLK

11 = Output – Source OSCCLK

PLLB 4

07h

8:7

CLKOUTSRC

CLKOUT pin source

00 = No Output (tristate)

01 = Output – Source PLLACLK

10 = Output – Source PLLBCLK

11 = Output – Source OSCCLK

1:0

DAC_CLKSEL

DAC clock source

00 = MCLK pin

01 = PLLACLK

10 = PLLBCLK

11 = MCLK pin

CLKSEL

08h

3:2

ADC_CLKSEL

ADC clock source

00 = ADCMLCK pin

01 = PLLACLK

10 = PLLBCLK

11 = MCLK pin

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