WM8985GEFLSLASHR datasheet(106/121 Pages) WOLFSON

106 / 121 page

WM8985

Production Data

PD, Rev 4.6, July 2009

106

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

3:1

000

Reserved. Initialise to 000

Reserved. Initialise to 0

44 (2Ch)

MBVSEL

Microphone Bias Voltage Control

0 = 0.9 * AVDD

1 = 0.65 * AVDD

Input Signal

Path

Reserved. Initialise to 0

R2_2INPPGA

Connect R2 pin to right channel input PGA

positive terminal.

0=R2 not connected to input PGA

1=R2 connected to input PGA amplifier positive

terminal (constant input impedance).

Input Signal

Path

RIN2INPPGA

Connect RIN pin to right channel input PGA

negative terminal.

0=RIN not connected to input PGA

1=RIN connected to right channel input PGA

amplifier negative terminal.

Input Signal

Path

RIP2INPPGA

Connect RIP pin to right channel input PGA

amplifier positive terminal.

0 = RIP not connected to input PGA

1 = right channel input PGA amplifier positive

terminal connected to RIP (constant input

impedance)

Input Signal

Path

Reserved. Initialise to 0

L2_2INPPGA

Connect L2 pin to left channel input PGA

positive terminal.

0=L2 not connected to input PGA

1=L2 connected to input PGA amplifier positive

terminal (constant input impedance).

Input Signal

Path

LIN2INPPGA

Connect LIN pin to left channel input PGA

negative terminal.

0=LIN not connected to input PGA

1=LIN connected to input PGA amplifier

negative terminal.

Input Signal

Path

LIP2INPPGA

Connect LIP pin to left channel input PGA

amplifier positive terminal.

0 = LIP not connected to input PGA

1 = input PGA amplifier positive terminal

connected to LIP (constant input impedance)

Input Signal

Path

45 (2Dh)

INPPGAU

N/A

INPPGAVOLL and INPPGAVOLR volume do

not update until a 1 is written to

INPPGAUPDATE (in reg 45 or 46)

Input Signal

Path

INPPGAZCL

Left channel input PGA zero cross enable:

0=Update gain when gain register changes

1=Update gain on 1st zero cross after gain

Input Signal

Path

INPPGAMUTEL

Mute control for left channel input PGA:

0=Input PGA not muted, normal operation

1=Input PGA muted (and disconnected from the

following input BOOST stage).

Input Signal

Path

5:0

INPPGAVOLL

010000

Left channel input PGA volume

000000 = -12dB

000001 = -11.25db

010000 = 0dB

111111 = 35.25dB

Input Signal

Path

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