Production Data

WM8736

WOLFSON MICROELECTRONICS LTD

PD Rev 2.1 January 2001

9

MODES OF OPERATION

Control of the various modes of operation is either by software control over the serial interface, or

by hard-wired pin control. Selection of software or hardware mode is via MODE pin. The following

functions may be controlled either via the serial control interface or by hard wiring of the

appropriate pins.

FUNCTION

OPTIONS

SOFTWARE CONTROL

DEFAULT VALUE

PIN 8: MODE = 0

HARDWARE CONTROL

BEHAVIOUR

PIN 8: MODE = 1

Input audio data format

Normal format

I

I

I

Pin 12, 13: ML/I2S, MC/IWL =

00 or 01 or 10

Pin 12, 13: ML/I2S, MC/IWL = 11

Input word length

16

18

20

24

IW[1:0] = 00 (default)

IW[1:0] = 11

IW[1:0] = 01

IW[1:0] = 10

Pin 12, 13: ML/I2S, MC/IWL = 00

Pin 12, 13: ML/I2S, MC/IWL = 11 (I

Pin 12, 13: ML/I2S, MC/IWL = 01

Pin 12, 13: ML/I2S, MC/IWL = 10

De-emphasis selection

On

Off

DE = 1

DE = 0 (Default)

Pin 14: MD/DM = 1

Pin 14: MD/DM = 0

Mute

On

Off

MU = 1

MU = 0 (default)

Pin 9: MUTE = 1

Pin 9: MUTE = 0

Reset and power down

control

WM8736 off

WM8736 on

Available from Pin 10: RSTB

Pin 10: RSTB = 0

Pin 10: RSTB = 1

Input LRCIN polarity

Lch/Rch =

High/Low

Lch/Rch =

Low/High

LRP = 0 (default)

LRP = 1

Not available in hardware mode,

default value set

Volume control

Lch, Rch

individually

Lch, Rch

common

ATC = 0; 0dB (default)

ATC = 1

Not available in hardware mode,

default 0dB

Infinite zero detect

On

Off

IZD = 1

IZD = 0 (default)

Operation enable (OPE)

Enabled

Disabled

OPE = 0 (default)

OPE = 1

Automute function controlled

from MUTE pin

low = not mute

Z = automute enable

high = muted

DAC output control

See Table 7

for all options

Default is PL[3:0] = 1001, stereo mode

Not available in hardware mode

Table 3 Control Function Summary