WM8746 Wolfson Microelectronics plc, WM8746 Datasheet - Page 14

• Manufacturer Part Number: WM8746
• Description: 24-bit, 192khz 6-channel Dac With Volume Control
• Manufacturer: Wolfson Microelectronics plc

WM8746
MODES OF OPERATION
Table 5 Control Function Summary
w
Input audio data format
De-emphasis selection
Input LRCIN polarity
DAC output control
Infinite zero detect
Input word length
Volume control
Power down
Mute
FUNCTION
Right justified
for all options
DSP formats
Left justified
See Table 6
Control of the various modes of operation for the WM8746 is either by software control over the serial
interface ,or by hard-wired pin control. Selection of software or hardware mode is via the MODE pin.
The following functions may be controlled either via the serial control interface or by hard wiring of
the appropriate pins.
individually
I
OPTIONS
2
Lch, Rch
Lch, Rch
common
Inverted
Chip on
Chip off
Normal
S format
On
Off
On
Off
On
Off
16
20
24
32
Default is PL[3:0] = 1001, stereo mode
SOFTWARE CONTROL
DEEMPH = 0 (Default)
ATC = 0; 0dB (default)
IWL[1:0] = 10 (default)
PWDN = 0 (default)
MUTE = 0 (default)
FMT = 00 (default)
DEFAULT VALUE
PIN 8: MODE = 0
LRP = 0 (default)
IZD = 0 (default)
IWL[1:0] = 00
IWL[1:0] = 01
IWL[1:0] = 11
DEEMPH = 1
PWDN = 1
MUTE = 1
FMT = 01
FMT = 10
FMT = 11
ATC = 1
LRP = 1
IZD = 1
Automute function controlled from MUTE pin
Pin 12, 13: ML/I2S, MC/IWL = 00, 01 or 10
Pin 12, 13: ML/I2S, MC/IWL = 11 (I
Pin 12, 13: ML/I2S, MC/IWL = 00 (RJ)
Pin 12, 13: ML/I2S, MC/IWL = 01 (RJ)
Pin 12, 13: ML/I2S, MC/IWL = 10 (RJ)
Pin 12, 13: ML/I2S, MC/IWL = 11
Not available in hardware mode,
Not available in hardware mode,
Not available in hardware mode
Not available in hardware mode
Not available in hardware mode
floating = automute enable
HARDWARE CONTROL
gain defaults to 0dB
Pin 14: MD/DM = 1
Pin 14: MD/DM = 0
low = never mute
PIN 8: MODE = 1
Pin 9: MUTE = 1
Pin 9: MUTE = 0
default value set
BEHAVIOUR
high = mute
Stop SCKI
Run SCKI
PD, October 2008, Rev 4.2
Production Data
2
S)
14