WM9090
Production Data
w
PD, November 2010, Rev 4.1
72
REGISTER
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
Register 62h
AGC Control 0
REGISTER
ADDRESS
BIT LABEL
DEFAULT
DESCRIPTION
REFER
TO
R99 (63h)
AGC Control
1
15
AGC_PWR_E
NA
1
Enable AGC Power Limit Mode
0 = Disabled
1 = Enabled
12 AGC_PWR_AV
G
0
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
