WM8956
Production Data
PIN DESCRIPTION
PIN NO
NAME
MICBIAS
TYPE
Analogue Output
Analogue Input
DESCRIPTION
Microphone bias
1
2
Left channel line input /
LINPUT3 / JD2
Left channel positive differential MIC input /
Jack detect input pin
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Left channel line input /
3
4
5
6
7
LINPUT2
LINPUT1
Left channel positive differential MIC input
Left channel single-ended MIC input /
Left channel negative differential MIC input
Right channel single-ended MIC input /
Right channel negative differential MIC input
Right channel line input /
RINPUT1
RINPUT2
Right channel positive differential MIC input
Right channel line input /
RINPUT3 / JD3
Right channel positive differential MIC input /
Jack detect input pin
Supply
Digital core supply
8
DCVDD
DGND
Supply
Digital ground (Return path for both DCVDD and DBVDD)
Digital buffer (I/O) supply
9
Supply
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
DBVDD
MCLK
Digital Input
Master clock
Digital Input / Output
Digital Input / Output
Digital Input
Audio interface bit clock
BCLK
Audio interface DAC left / right clock
DAC digital audio data
DACLRC
DACDAT
GPIO1
Digital Input / Output
Do not connect
Digital Input
GPIO1 pin
Leave this pin floating
DNC
Control interface clock input
Control interface data input / 2-wire acknowledge output
Right speaker negative output
Ground for speaker drivers 2
Supply for speaker drivers 2
Right speaker positive output
Left speaker negative output
Ground for speaker drivers 1
Left speaker positive output
SCLK
Digital Input/Output
Analogue Output
Supply
SDIN
SPK_RN
SPKGND2
SPKVDD2
SPK_RP
SPK_LN
SPKGND1
SPK_LP
SPKVDD1
VMID
Supply
Analogue Output
Analogue Output
Supply
Analogue Output
Supply
Supply for speaker drivers 1
Midrail voltage decoupling capacitor
Analogue ground (Return path for AVDD)
Right output (Line or headphone)
Mono, left, right or buffered midrail output for capless mode
Left output (Line or headphone)
Analogue supply
Analogue Output
Supply
AGND
Analogue Output
Analogue Output
Analogue Output
Supply
HP_R
OUT3
HP_L
AVDD
Die Paddle (Note 1)
GND_PADDLE
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”
PD, November 2011, Rev 4.1
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