WM9090ECSSLASHR datasheet(72/81 Pages) WOLFSON

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WM9090

Production Data

PD, November 2010, Rev 4.1

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

2:0

AGC_CLIP_DC

Y [2:0]

000

AGC Anti-Clip Decay Rate

Sets the rate of AGC gain increments after a period of

clipping

000 = 120ms/6dB

001 = 480ms/6dB

010 = 820ms/6dB

011 = 1170ms/6dB

100 = 1640ms/6dB

101 = 2050ms/6dB

110 = 2730ms/6dB

111 = 4100ms/6dB

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R99 (63h)

AGC Control

AGC_PWR_E

Enable AGC Power Limit Mode

0 = Disabled

1 = Enabled

AGC_PWR_AV

AGC Power Measurement mode

0 = Instantaneous power

1 = RMS power

11:8

AGC_PWR_TH

R [2:0]

0000

AGC Power Limit Threshold

Sets the output level at which Power limiting will be

applied. Assumes RMS power mode and 8ohm

speaker.

0000 = 300mW

0001 = 350mW

0010 = 400mW

0011 = 450mW

0100 = 500mW

0101 = 550mW

0110 = 600mW

0111 = 650mW

1000 = 700mW

1001 = 750mW

1010 = 800mW

1011 = 850mW

1100 = 900mW

1101 = 950mW

1110 = 1000mW

1111 = 1050mW

6:4

AGC_PWR_AT

K [2:0]

000

AGC Power Limiting Attack Rate

Sets the rate of AGC gain reduction when power

limiting is applied

000 = 120ms/6dB

001 = 480ms/6dB

010 = 840ms/6dB

011 = 1200ms/6dB

100 = 1680ms/6dB

101 = 2040ms/6dB

110 = 2760ms/6dB

111 = 4080ms/6dB

WM9090ECS/R データシート(PDF) 72 Page - Wolfson Microelectronics plc

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