Q305: WM8742 DAC-2
PIN DESCRIPTION (SOFTWARE CONTROL MODE)
PIN
NAME
TYPE
DESCRIPTION
PCM MODE
8FS PCM MODE
DSD MODES
1
LRCLK /
DSDL
Digital input
Audio interface left/right
clock input
DSD left audio data in
2
DIN /
DINL
Digital input
Audio interface data
input
Audio interface left data
input
Audio interface left/right
clock input
Unused
3
BCLK /
DSD64CLK
Digital input
Audio interface bit
clock input
Audio interface bit
clock input
64fs system clock input
4
FSEL /
DINR
Digital input
Tri-level
Unused
Audio interface right data
input
Unused
5
MCLK
Digital input
Master clock input
Master clock input
Unused
6
DIFFHW
Digital input
internal pull
down
Differential mono mode
selection.
0 = normal operation
1 = differential mono
mode
Differential mono mode
selection
0 = normal operation
1 = differential mono
mode
Differential mono mode
selection
0 = normal operation
1 = differential mono
mode
7
DGND
Supply
Digital ground
Digital ground
Digital ground
8
DVDD
Supply
Digital supply
Digital supply
Digital supply
9
AVDDR
Analogue input
Right analogue positive
reference
Right analogue positive
reference
Right analogue positive
reference
10
AGNDR
Analogue input
Right analogue negative
reference
Right analogue negative
reference
Right analogue negative
reference
11
VMIDR
Analogue
output
Righi analogue midrail
decoupling pin
Righi analogue midrail
decoupling pin
Righi analogue midrail
decoupling pin
12
VOUTRP
Analogue
output
Analogue
output
Supply
Supply
Analogue
output
Analogue
output
Analogue
output
Analogue input
Analogue input
Digital output
13
14
15
16
17
18
19
20
21
Right DAC positive
output
Right DAC positive
output
Right DAC positive
output
VOUTRN
Right DAC negative
output
Right DAC negative
output
Right DAC negative
output
AGND
Analogue ground
Analogue ground
Analogue ground
AVDD
Analogue supply
Analogue supply
Analogue supply
VOUTLN
Left DAC negative
output
Left DAC negative
output
Left DAC negative
output
VOUTLP
Left DAC positive
output
Left DAC positive
output
Left DAC positive
output
VMIDL
Left analogue midrall
decoupling pin
Left analogue midrall
decoupling pin
Left analogue midrall
decoupling pin
AGNDL
Left analogue negative
reference
Left analogue negative
reference
Left analogue negative
reference
AVDDL
Left analogue positive
reference
Left analogue positive
reference
Left analogue positive
reference
ZFLAG
Zero flag output
Zero flag output
Zero flag output
C-S5VL
IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION