WM8904 데이터 시트보기 (PDF) - Wolfson Microelectronics plc
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WM8904 Datasheet PDF : 188 Pages
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Pre-Production
WM8904
PIN DESCRIPTION
NAME
IN1L / DMICDAT1
WLCSP 6×6
QFN-32
B3
27
IN2L
A2
26
IN3L
C3
n/a
IN1R / DMICDAT2 A1
25
IN2R
B2
24
IN3R
C2
n/a
MICBIAS
D1
20
MICVDD
E1
19
HPOUTL
E3
13
HPOUTR
E2
15
HPOUTFB
F3
14
LINEOUTL
F2
16
LINEOUTR
F1
18
LINEOUTFB
D2
17
CPVDD
E6
7
CPGND
F6
9
CPCA
E5
8
CPCB
F5
10
CPVOUTP
E4
11
CPVOUTN
F4
12
AVDD
B1
23
AGND
VMIDC
DCVDD
DBVDD
C1
22
D3
21
D5
6
C6
4
DGND
D6
5
MCLK
A4
28
BCLK / GPIO4
C4
29
LRCLK
A5
30
DACDAT
A6
32
ADCDAT
B5
31
SCLK
B6
2
SDA
D4
3
GPIO1 / IRQ
C5
1
GPIO2
B4
n/a
GPIO3
A3
n/a
GND_PADDLE
n/a
33
TYPE
Analogue / Digital Input
Analogue Input
Analogue Input
Analogue / Digital Input
Analogue Input
Analogue Input
Analogue Output
Supply
Analogue Output
Analogue Output
Analogue Input
Analogue Output
Analogue Output
Analogue Input
Supply
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Supply
Supply
Supply
Supply
Supply
Digital Input
Digital Input / Output
Digital Input / Output
Digital Input
Digital Output
Digital Input
Digital Input / Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
DESCRIPTION
Left channel input 1 /
Digital microphone data input 1
Left channel input 2
Left channel input 3
Right channel input 1 /
Digital microphone data input 2
Right channel input 2
Right channel input 3
Microphone bias
Microphone bias amp supply
Left headphone output (line or headphone
output)
Right headphone output (line or headphone
output)
Headphone output ground loop noise rejection
feedback
Left line output 1 (line output)
Right line output 1 (line output)
Line output ground loop noise rejection
feedback
Charge pump power supply
Charge pump ground
Charge pump flyback capacitor pin
Charge pump flyback capacitor pin
Charge pump positive supply decoupling
(powers HPOUTL/R, LINEOUTL/R)
Charge pump negative supply decoupling
(powers HPOUTL/R, LINEOUTL/R)
Analogue power supply (powers analogue
inputs, reference, ADC, DAC)
Analogue power return
Midrail voltage decoupling capacitor
Digital core supply
Digital buffer supply (powers audio interface
and control interface)
Digital ground (return path for DCVDD and
DBVDD)
Master clock for CODEC
Audio interface bit clock / GPIO4
Audio interface left / right clock (common for
ADC and DAC)
DAC digital audio data
ADC digital audio data
Control interface clock input
Control interface data input / output
GPIO1 / Interrupt
GPIO2
GPIO3
Die Paddle
Note:
1. It is recommended that the QFN ground paddle is connected to analogue ground on the application PCB.
w
PP, Rev 3.3, September 2012
9
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