Pin Description - Cirrus Logic WM8940 Manual

Mono codec with speaker driver
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PIN DESCRIPTION

PIN
NAME
1
MICBIAS
2
AVDD
3
AGND
4
DCVDD
5
DBVDD
6
DGND
7
ADCDAT
8
DACDAT
9
FRAME
10
BCLK
11
MCLK
12
CSB/GPIO
13
SCLK
14
SDIN
15
MODE / GPIO
16
MONOOUT
17
SPKOUTP
18
SPKGND
19
SPKOUTN
20
SPKVDD
21
AUX
22
VMID
23
MICN
24
MICP
Note:
1.
It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB.
Refer to the application note WAN_0118 on "Guidelines on How to Use QFN Packages and Create Associated PCB Footprints"
2.
Rev 4.4
TYPE
Analogue Output
Microphone bias
Supply
Analogue supply
Supply
Analogue ground
Supply
Digital Supply (Core)
Supply
Digital supply (Input/Output)
Supply
Digital ground
Digital Output
ADC digital audio data output
Digital Input
DAC digital audio data input
Digital Input / Output
DAC and ADC sample rate clock or frame synch
Digital Input / Output
Digital audio port clock
Digital Input
Master clock input
Digital Input / Output
3-Wire control interface chip select or GPIO pin.
Digital Input
3-Wire control interface clock Input / 2-Wire control interface clock
input
Digital Input / Output
3-Wire control interface data Input / 2-Wire control interface data input
Digital Input
Control interface mode selection pin or GPIO pin.
Analogue Output
Mono output
Analogue Output
Speaker output positive
Supply
Speaker ground
Analogue Output
Speaker output negative
Supply
Speaker supply
Analogue Input
Auxiliary analogue input
Reference
Decoupling for midrail reference voltage
Analogue Input
Microphone negative input (common mode)
Analogue Input
Microphone positive input
WM8940
DESCRIPTION
7

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