wm8941 Wolfson Microelectronics plc, wm8941 Datasheet - Page 85

• Manufacturer Part Number: wm8941
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
45 (2Dh)
46 (2Eh)
47 (2Fh)
48 (30h)
49 (31h)
50 (32h)
REGISTER
ADDRESS
0
15:8
7
6
5:0
15:0
15:9
8
7
6:4
3
2:0
15:0
15:2
1
0
15:6
BIT
MICP2INPPGA
INPPGAZC
INPPGAMUTE
INPPGAVOL
PGABOOST
MICP2BOOSTVOL 000
AUX2BOOSTVOL 000
TSDEN
VROI
LABEL
0
00h
0
1
010000
0000h
00h
0
0
0
0000h
0000h
1
0
000h
DEFAULT
Connect input PGA amplifier positive terminal to MICP
or VMID.
0 = input PGA amplifier positive terminal connected to
VMID
1 = input PGA amplifier positive terminal connected to
MICP through variable resistor string
Reserved
0=Update gain when gain register changes
1=Update gain on 1
write.
0=Input PGA not muted, normal operation
1=Input PGA muted (and disconnected from the
following input BOOST stage).
Input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = 35.25dB
Reserved
Reserved
0 = PGA output has +0dB gain through input BOOST
stage.
1 = PGA output has +20dB gain through input BOOST
stage.
Reserved
Controls the MICP pin to the input boost stage (NB,
when using this path set MICP2INPPGA=0):
000=Path disabled (disconnected)
001=-12dB gain through boost stage
010=-9dB gain through boost stage
…
111=+6dB gain through boost stage
Reserved
Controls the auxiliary amplifier to the input boost stage:
000=Path disabled (disconnected)
001=-12dB gain through boost stage
010=-9dB gain through boost stage
…
111=+6dB gain through boost stage
Reserved
Reserved
0 : thermal shutdown disabled
1 : thermal shutdown enabled
VREF (AVDD/2 or 1.5xAVDD/2) to analogue output
resistance
0: approx 1kΩ
1: approx 30 kΩ
Reserved
Input PGA zero cross enable:
Mute control for input PGA:
Input Boost
Thermal Shutdown Enable
DESCRIPTION
st
zero cross after gain register
PD, Rev 4.0, August 2008
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Output Switch
Analogue Outputs
REFER TO
WM8941
85