Pin Description - Cirrus Logic WM8940 Manual

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