WM8608 datasheet(46/54 Pages) WOLFSON

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WM8608

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PP Rev 1.5 March 2004

RESET

The WM8608 device can be reset writing to the Reset register as defined in Table 51.

BIT

LABEL

DEFAULT

DESCRIPTION

RLENA

Writing 1 to bit 0 of the register will

reset OPDIS

R30 (1Eh)

Reset

all

RESET

Writing all 1’s to the register will

reset the device and register

settings

Table 51 Reset

Note: RESET or RLENA will be applied at the end of the register write and released at the beginning

of the next register write. I.e. to reset the OPDIS register write 1 to bit 0 of the Reset register and

them write 0 to bit 0.

EXTERNAL POWER SUPPLY CLOCK

The WM8608 device can generate a clock signal for an external PSU (Power Supply Unit) which is

available at the CLKPSU pin.

CLKPSU

PCLKPSU

HCLKPSU

Figure 24 External Power Supply Clock

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

ENPSU

CLKPSU enable

1: enabled

2:1

CLKPSU[1:0]

CLKPSU frequency

00: CLKPSU = fPRF

01: CLKPSU = fPRF/2

10: CLKPSU = fPRF/4

11: CLKPSU = fPRF/6

R31 (1Fh)

PSU

4:3

DCYPSU[1:0]

CLKPSU duty cycle

00: thclkpsu/tpclkpsu = 0.5 (50%)

01: thclkpsu/tpclkpsu = 0.125 (12.5%)

10: thclkpsu/tpclkpsu = 0.0625 (6.25%)

11: thclkpsu/tpclkpsu = 0.03125 (3.125%)

Table 52 PSU Clock

Note: See Table 45 for specification of fPRF.

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