WM8941
Pre Production
PIN DESCRIPTION
PIN
1
NAME
MICBIAS
AVDD
TYPE
Analogue Output
Supply
DESCRIPTION
Microphone bias
Analogue supply
Analogue ground
Digital Supply (Core)
2
3
AGND
Supply
4
DCVDD
DBVDD
DGND
Supply
5
Supply
Digital supply (Input/Output)
Digital ground
6
Supply
7
ADCDAT
DACDAT
FRAME
BCLK
Digital Output
Digital Input
Digital Input / Output
Digital Input / Output
Digital Input
Digital Input / Output
ADC digital audio data output
DAC digital audio data input
8
9
DAC and ADC sample rate clock or frame synch
Digital audio port clock
10
11
12
13
14
MCLK
Master clock input
CSB/GPIO
3-Wire control interface chip select or GPIO pin
Control interface mode selection or GPIO pin
MODE/GPIO Digital Input
SCLK
Digital Input
3-Wire control interface clock Input / 2-Wire control interface clock
input
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SDIN
VBVDD
VBOUT
VBREF
VBIN
Digital Input / Output
Supply
3-Wire control interface data Input / 2-Wire control interface data input
Vide buffer supply
Analogue Output
Analogue Output
Analogue Input
Analogue Output
Analogue Output
Supply
Video buffer TV output
Video buffer reference pin
Video buffer input
MONOOUT
SPKOUTP
SPKGND
SPKOUTN
SPKVDD
AUX
Mono output
Speaker output positive
Speaker ground
Analogue Output
Supply
Speaker output negative
Speaker supply
Analogue Input
Reference
Auxiliary analogue input
VMID
Decoupling for midrail reference voltage
Microphone negative input (common mode)
Microphone positive input
MICN
Analogue Input
Analogue Input
MICP
Note:
1. It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB.
2. Refer to the application note WAN_0118 on “Guidelines on How to Use QFN Packages and Create Associated PCB
Footprints”
PP, Rev 3.3, December 2007
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
