WM8734 datasheet(6/46 Pages) WOLFSON

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WM8734

Production Data

PD Rev 4.1 November 2006

PIN DESCRIPTION - QFN

NAME

TYPE

DESCRIPTION

MCLK

Digital Input

Master Clock Input (MCLK)

Do Not Connect

Test Pin, must be left unconnected

DCVDD

Supply

Digital Core VDD

DGND

Ground

Digital GND

DBVDD

Supply

Digital Buffers VDD

Do Not Connect

Test Pin, must be left unconnected

BCLK

Digital Input/Output

Digital Audio Bit Clock, Pull Down, (see Note 1)

DACDAT

Digital Input

DAC Digital Audio Data Input

DACLRC

Digital Input/Output

DAC Sample Rate Left/Right Clock. Pull Down (see Note 1)

ADCDAT

Digital Output

ADC Digital Audio Data Output

ADCLRC

Digital Input/Output

ADC Sample Rate Left/Right Clock, Pull Down (see Note 1)

Do Not Connect

Test Pin, must be left unconnected

Do Not Connect

Test Pin, must be left unconnected

Do Not Connect

Test Pin, must be left unconnected

Do Not Connect

Test Pin, must be left unconnected

LOUT

Analogue Output

Left Channel Line Output

ROUT

Analogue Output

Right Channel Line Output

AVDD

Supply

Analogue VDD

AGND

Ground

Analogue GND

VMID

Analogue Output

Mid-rail reference decoupling point

Do Not Connect

Test Pin, must be left unconnected

Do Not Connect

Test Pin, must be left unconnected

RLINEIN

Analogue Input

Right Channel Line Input (AC coupled)

LLINEIN

Analogue Input

Left Channel Line Input (AC coupled)

MODE

Digital Input

Control Interface Selection, Pull Up (see Note 1)

CSB

Digital Input

3-Wire MPU Chip Select / 2-Wire MPU interface address selection, active low,

Pull up (see Note 1)

SDIN

Digital Input/Output

3-Wire MPU Data Input / 2-Wire MPU Data Input

SCLK

Digital Input

3-Wire MPU Clock Input / 2-Wire MPU Clock Input

Note: It is recommended that the QFN ground paddle is connected to analogue ground on the application PCB.

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