Production Data
WM8912
PIN DESCRIPTION
NAME
IRQ/GPIO1
SCLK
QFN-32
TYPE
Digital Input / Output
Digital Input
DESCRIPTION
1
2
3
4
GPIO1 / Interrupt
Control interface clock input
SDA
Digital Input / Output
Supply
Control interface data input / output
DBVDD
Digital buffer supply (powers audio interface and control
interface)
DGND
5
6
Supply
Digital ground (return path for DCVDD and DBVDD)
Digital core supply
DCVDD
CPVDD
CPCA
Supply
7
Supply
Charge pump power supply
8
Analogue Input
Supply
Charge pump flyback capacitor pin
Charge pump ground
CPGND
CPCB
9
10
11
Analogue Input
Analogue Output
Charge pump flyback capacitor pin
CPVOUTP
Charge pump positive supply decoupling (powers
HPOUTL/R, LINEOUTL/R)
CPVOUTN
12
Analogue Output
Charge pump negative supply decoupling (powers
HPOUTL/R, LINEOUTL/R)
HPOUTL
HPOUTFB
HPOUTR
LINEOUTL
LINEOUTFB
LINEOUTR
DNC
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
n/a
Left headphone output (line or headphone output)
Headphone output ground loop noise rejection feedback
Right headphone output (line or headphone output)
Left line output 1 (line output)
Line output ground loop noise rejection feedback
Right line output 1 (line output)
Do Not Connect
DNC
n/a
Do Not Connect
VMIDC
Analogue Output
Supply
Midrail voltage decoupling capacitor
Analogue power return
AGND
AVDD
Supply
Analogue power supply
DNC
n/a
Do Not Connect
DNC
n/a
Do Not Connect
DNC
n/a
Do Not Connect
DNC
n/a
Do Not Connect
MCLK
Digital Input
Digital Input / Output
Digital Input / Output
n/a
Master clock for DAC
BCLK/GPIO4
LRCLK
Audio interface bit clock / GPIO4
Audio interface left / right clock
Do Not Connect
DNC
DACDAT
GND_PADDLE
Digital Input
DAC digital audio data
Die Paddle
Note:
It is recommended that the QFN ground paddle is connected to analogue ground on the application PCB.
PD, Rev 4.0, September 2010
w
7
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
