WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 39

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
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Table 28 DAC Digital Limiter Control
R24
DAC digital
limiter control 1
R25
DAC digital
limiter control 2
REGISTER
ADDRESS
3:0
7:4
8
3:0
6:4
BIT
LIMATK
LIMDCY
LIMEN
LIMBOOST
LIMLVL
LABEL
0010
0011
0
0000
000
DEFAULT
Limiter Attack time (per 6dB gain change) for
44.1kHz sampling. Note that these will scale
with sample rate.
0000=94us
0001=188s
0010=375us
0011=750us
0100=1.5ms
0101=3ms
0110=6ms
0111=12ms
1000=24ms
1001=48ms
1010=96ms
1011 to 1111=192ms
Limiter Decay time (per 6dB gain change)
for 44.1kHz sampling. Note that these will
scale with sample rate:
0000=750us
0001=1.5ms
0010=3ms
0011=6ms
0100=12ms
0101=24ms
0110=48ms
0111=96ms
1000=192ms
1001=384ms
1010=768ms
1011 to 1111=1.536s
Enable the DAC digital limiter:
0=disabled
1=enabled
Limiter volume boost (can be used as a
stand alone volume boost when
LIMEN=0):
0000=0dB
0001=+1dB
0010=+2dB
… (1dB steps)
1011=+11dB
1100=+12dB
1101 to 1111=reserved
Programmable signal threshold level
(determines level at which the limiter
starts to operate)
000=-1dB
001=-2dB
010=-3dB
011=-4dB
100=-5dB
101 to 111=-6dB
PD, Rev 4.5, September 2008
DESCRIPTION
WM8974
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