WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 102

• Manufacturer Part Number: WM8985GEFL
• Description: Audio CODECs Multimedia CODEC with Class D HP
• Manufacturer: Wolfson Microelectronics

Specifications of WM8985GEFL

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8985
w
25 (19h)
27 (1Bh)
28 (1Ch)
REGISTER
ADDRESS
3:0
8:7
6:4
3:0
8
7
6:0
8
7
6:0
BIT
LIMATK
LIMLVL
LIMBOOST
NFU
NFEN
NFA0[13:7]
NFU
NFA0[6:0]
LABEL
0010
00
000
0000
0
0
0000000
0
0
0000000
DEFAULT
DAC 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
Reserved. Initialise to 0
Programmable signal threshold level
(determines level at which the DAC limiter starts
to operate)
000=-1dB
001=-2dB
010=-3dB
011=-4dB
100=-5dB
101 to 111=-6dB
DAC 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
Notch filter update. The notch filter values used
internally only update when one of the NFU bits
is set high.
Notch filter enable:
0=Disabled
1=Enabled
Notch Filter a0 coefficient, bits [13:7]
Notch filter update. The notch filter values used
internally only update when one of the NFU bits
is set high.
Reserved. Initialise to 0
Notch Filter a0 coefficient, bits [6:0]
DESCRIPTION
PD, Rev 4.6, July 2009
Output Signal
Path
Output Signal
Path
Output Signal
Path
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Production Data
REFER TO
102