WM8720
Production Data
PIN DESCRIPTION
PIN
1
NAME
PWDN
SCKI
TYPE
DESCRIPTION
Digital input
Digital input
Digital output
Digital input
Powerdown control; low is ON, high is POWER OFF. Internal pull-down.
2
System clock input (256 or 384fs).
Reserved.
3
TEST
4
ML/I2S
Latch enable (software mode) or input format selection (hardware mode).
Internal pull-up.
5
6
MC/IWL
MD/DM
Digital input
Digital input
Serial control data clock input (software mode) or input word length
selection (hardware mode). Internal pull-up.
Serial control data input (software mode) or de-emphasis selection
(hardware mode). Internal pull-up.
7
8
RSTB
ZERO
Digital input
Reset input – active low. Internal pull-up.
Digital output
Infinite zero detect – active low. Open drain type output with active
pull-down.
9
VOUTR
AGND
AVDD
VOUTL
CAP
Analogue output
Supply
Right channel DAC output.
Analogue ground supply.
Analogue positive supply.
Left channel DAC output.
Analogue internal reference.
Audio data bit clock input.
Serial audio data input.
10
11
12
13
14
15
16
17
Supply
Analogue output
Analogue output
Digital input
Digital input
Digital input
Digital IO
BCKIN
DIN
LRCIN
MUTE
Sample rate clock input.
Mute control pin, input or automute output.
Low is not mute, high is mute, Z is automute.
18
MODE
Digital input
Mode select pin. Low is software mode, high is hardware control.
Internal pull-down.
19
20
DVDD
DGND
Supply
Supply
Digital positive supply.
Digital ground supply.
Note:
Digital input pins have Schmitt trigger input buffers.
PD Rev 4.0. February 2005
3
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
