WM8956
Preliminary Technical Data
PIN DESCRIPTION
PIN NO
NAME
MICBIAS
TYPE
Analogue Output
Analogue Input
DESCRIPTION
1
2
Microphone bias
LINPUT3 / JD2
Left channel line input /
Left channel positive differential MIC input /
Jack detect input pin
3
4
5
6
7
LINPUT2
LINPUT1
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Left channel line input /
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
8
DCVDD
DGND
Supply
Digital core supply
9
Supply
Digital ground (Return path for both DCVDD and DBVDD)
Digital buffer (I/O) 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
Supply
Digital Input
Master clock
BCLK
Digital Input / Output
Digital Input / Output
Digital Input
Audio interface bit clock
DACLRC
DACDAT
GPIO1
Audio interface DAC left / right clock
DAC digital audio data
Digital Input / Output
Do not connect
Digital Input
GPIO1 pin
DNC
Leave this pin floating
SCLK
Control interface clock input
SDIN
Digital Input/Output
Analogue Output
Supply
Control interface data input / 2-wire acknowledge output
Right speaker negative output
Ground for speaker drivers 2
Supply for speaker drivers 2
SPK_RN
SPKGND2
SPKVDD2
SPK_RP
SPK_LN
SPKGND1
SPK_LP
SPKVDD1
VMID
Supply
Analogue Output
Analogue Output
Supply
Right speaker positive output
Left speaker negative output
Ground for speaker drivers 1
Left speaker positive output
Analogue Output
Supply
Supply for speaker drivers 1
Analogue Output
Supply
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
AGND
HP_R
Analogue Output
Analogue Output
Analogue Output
Supply
OUT3
HP_L
AVDD
GND_PADDLE
Die Paddle (Note 1)
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”
PTD, July 2007, Rev 2.1
w
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
