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WM8731 Datasheet(PDF) 5 Page - Wolfson Microelectronics plc

Part No. WM8731
Description  Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
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Maker  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
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WM8731 Datasheet(HTML) 5 Page - Wolfson Microelectronics plc

 
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WM8731 / WM8731L
Production Data
w
PD Rev 4.3 August 2006
5
PIN DESCRIPTION
28 PIN
SSOP
28 PIN
QFN
NAME
TYPE
DESCRIPTION
1
5
DBVDD
Supply
Digital Buffers VDD
2
6
CLKOUT
Digital Output
Buffered Clock Output
3
7
BCLK
Digital Input/Output
Digital Audio Bit Clock, Pull Down, (see Note 1)
4
8
DACDAT
Digital Input
DAC Digital Audio Data Input
5
9
DACLRC
Digital Input/Output
DAC Sample Rate Left/Right Clock, Pull Down (see Note 1)
6
10
ADCDAT
Digital Output
ADC Digital Audio Data Output
7
11
ADCLRC
Digital Input/Output
ADC Sample Rate Left/Right Clock, Pull Down (see Note 1)
8
12
HPVDD
Supply
Headphone VDD
9
13
LHPOUT
Analogue Output
Left Channel Headphone Output
10
14
RHPOUT
Analogue Output
Right Channel Headphone Output
11
15
HPGND
Ground
Headphone GND
12
16
LOUT
Analogue Output
Left Channel Line Output
13
17
ROUT
Analogue Output
Right Channel Line Output
14
18
AVDD
Supply
Analogue VDD
15
19
AGND
Ground
Analogue GND
16
20
VMID
Analogue Output
Mid-rail reference decoupling point
17
21
MICBIAS
Analogue Output
Electret Microphone Bias
18
22
MICIN
Analogue Input
Microphone Input (AC coupled)
19
23
RLINEIN
Analogue Input
Right Channel Line Input (AC coupled)
20
24
LLINEIN
Analogue Input
Left Channel Line Input (AC coupled)
21
25
MODE
Digital Input
Control Interface Selection, Pull Up (see Note 1)
22
26
CSB
Digital Input
3-Wire MPU Chip Select/ 2-Wire MPU interface address
selection, active low, Pull up (see Note 1)
23
27
SDIN
Digital Input/Output
3-Wire MPU Data Input / 2-Wire MPU Data Input
24
28
SCLK
Digital Input
3-Wire MPU Clock Input / 2-Wire MPU Clock Input
25
1
XTI/MCLK
Digital Input
Crystal Input or Master Clock Input (MCLK)
26
2
XTO
Digital Output
Crystal Output
27
3
DCVDD
Supply
Digital Core VDD
28
4
DGND
Ground
Digital GND
Note:
1.
Pull Up/Down only present when Control Register Interface ACTIVE=0 to conserve power.
2.
It is recommended that the QFN ground paddle is connected to analogue ground on the application PCB.


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