WM8955BLGECOSLASHRV datasheet(4/44 Pages) WOLFSON

4 / 44 page

WM8955BL

Production Data

PD Rev 4.1 February 2007

PIN DESCRIPTION

PIN NO

NAME

TYPE

DESCRIPTION

MCLK

Digital Input

Master Clock

DCVDD

Supply

Digital Core Supply

DBVDD

Supply

Digital Buffer (I/O) Supply

DGND

Supply

Digital Ground (return path for both DCVDD and DBVDD)

BCLK

Digital Input / Output

Audio Interface Bit Clock

DACDAT

Digital Input

DAC Digital Audio Data

DACLRC

Digital Input / Output

Audio Interface Left / Right Clock

PLLGND

Supply

Internally connected to AGND. Connect this pin to AGND externally

for best PLL performance, or leave floating.

MONOOUT

Analogue Output

Mono Output

OUT3

Analogue Output

Output 3 (can be used as Headphone Pseudo Ground)

ROUT1

Analogue Output

Right Output 1 (Line or Headphone)

LOUT1

Analogue Output

Left Output 1 (Line or Headphone)

HPGND

Supply

Supply for Analogue Output Drivers (LOUT1/2, ROUT1/2)

ROUT2

Analogue Output

Right Output 2 (Line or Headphone or Earpiece)

LOUT2

Analogue Output

Left Output 2 (Line or Headphone or Earpiece)

HPVDD

Supply

Supply for Analogue Output Drivers (LOUT1/2, ROUT1/2, MONOUT)

AVDD

Supply

Analogue Supply

AGND

Supply

Analogue Ground (return path for AVDD)

VREF

Analogue Output

Reference Voltage Decoupling Capacitor

VMID

Analogue Output

Midrail Voltage Decoupling Capacitor

MONOIN-

Analogue Input

Negative end of MONOIN+, for differential mono signals

MONOIN+

Analogue Input

Analogue Line-in to mixers (mono channel)

LINEINR

Analogue Input

Analogue Line-in to mixers (right channel)

LINEINL

Analogue Input

Analogue Line-in to mixers (left channel)

MODE

Digital Input

Control Interface Selection

CSB

Digital Input

Chip Select / Device Address Selection

SDIN

Digital Input/Output

Control Interface Data Input / 2-wire Acknowledge output

SCLK

Digital Input

Control Interface Clock Input

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