WM8955LEFL datasheet(3/43 Pages) WOLFSON

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WM8955L

Product Preview Rev 0.4 May2003

PIN DESCRIPTION

PIN #

NAME

TYPE

DESCRIPTION

1MCLK

Digital Input

Master Clock

2DCVDD

SupplyDigital Core Supply

3DBVDD

SupplyDigital Buffer (I/O) Supply

4DGND

SupplyDigital Ground (return path for both DCVDD and DBVDD)

5BCLK

Digital Input / Output

Audio Interface Bit Clock

6DACDAT

Digital Input

DAC Digital Audio Data

7DACLRC

Digital Input / Output

Audio Interface Left / Right Clock

8CLKOUT

Digital Output

Buffered Clock Output (from MCLK or internal PLL)

PLLGND

SupplyInternally

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

SupplySupply

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

ROUT2

Analogue Output

Right Output 1 (Line or Headphone or Speaker)

LOUT2

Analogue Output

Left Output 1 (Line or Headphone or Speaker)

HPVDD

SupplySupply

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

AVDD

SupplyAnalogue Supply

AGND

SupplyAnalogue Ground (return path for AVDD)

VREF

Analogue Output

Reference Voltage Decoupling Capacitor

VMID

Analogue Output

Midrail Voltage Decoupling Capacitor

No Connect

No Internal Connection

HPDETECT

Logic Input

Headphone / Speaker switch (referred to AVDD)

No Connect

No Internal Connection

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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