Production Data
WM8741
PIN DESCRIPTION (HARDWARE CONTROL MODE)
PIN
NAME
TYPE
DESCRIPTION
PCM MODE
DSD DIRECT MODE
1
2
3
4
LRCLK /
DSDL
Digital input
Digital input
Digital input
Audio interface left/right clock input
Audio interface data input
DSD left audio data in
DIN /
Unused
DINL
BCLK /
DSD64CLK
FSEL /
DINR
Audio interface bit clock input
64fs system clock input
Unused
Digital input
Tri-level
Selects between one of three digital
filters – see Table 50
5
6
MCLK
Digital input
Master clock input
Unused
DIFFHW
Digital input
Differential mono mode selection
0 = normal operation
Differential mono mode selection
0 = normal operation
Internal pull-
down
1 = differential mono mode
Digital ground
1 = differential mono mode
Digital ground
7
8
DGND
DVDD
Supply
Supply
Digital supply
Digital supply
9
AVDDR
AGNDR
VMIDR
Analogue Input Right analogue positive reference
Analogue Input Right analogue negative reference
Right analogue positive reference
Right analogue negative reference
Right analogue midrail decoupling pin
10
11
Analogue
Output
Right analogue midrail decoupling pin
Right DAC positive output
12
13
VOUTRP
VOUTRN
Analogue
Output
Right DAC positive output
Right DAC negative output
Analogue
Output
Right DAC negative output
14
15
16
AGND
AVDD
Supply
Analogue ground
Analogue ground
Supply
Analogue supply
Analogue supply
VOUTLN
Analogue
Output
Left DAC negative output
Left DAC negative output
17
18
VOUTLP
VMIDL
Analogue
Output
Left DAC positive output
Left DAC positive output
Analogue
Output
Left analogue midrail decoupling pin
Left analogue midrail decoupling pin
19
20
21
22
AGNDL
AVDDL
Analogue Input Left analogue negative reference
Left analogue negative reference
Left analogue positive reference
Unused
Analogue Input Left analogue positive reference
ZFLAG
Digital Output
Zero flag output
OSR/DSDR
Digital input
Tri-level
Controls internal oversampling rate:
0 = low rate
DSD right audio data in
Z = medium rate
1 = high rate
23
IWO /
DOUT
Digital
input/output
Controls audio interface wordlength –
see Table 46
Unused
PD, Rev 4.2, October 2009
7
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
