WM8940 Wolfson Microelectronics Ltd., WM8940 Datasheet - Page 76

• Manufacturer Part Number: WM8940
• Description: Mono Codec with Speaker Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8940
w
46 (2Eh)
47 (2Fh)
48 (30h)
49 (31h)
50 (32h)
51 (33h)
52 (34h)
53 (35h)
REGISTER
ADDRESS
5:0
15:0
15:9
8
7
6:4
3
2:0
15:0
15:2
1
0
15:6
5
4:2
1
0
15:0
15:0
15:0
BIT
INPPGAVOL
PGABOOST
MICP2BOOSTVOL 000
AUX2BOOSTVOL 000
TSDEN
VROI
AUX2SPK
BYP2SPK
DAC2SPK
LABEL
1
0
0
010000
0000h
00h
0
0
0
0000h
0000h
0
000h
0
000
0000h
0000h
0000h
DEFAULT
Input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = 35.25dB
Reserved
Reserved
Input Boost
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
Thermal Shutdown Enable
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 uthorize
Reserved
Output of auxiliary amplifier to speaker mixer input
0 = not selected
1 = selected
Reserved
Bypass path (output of input boost stage) to speaker
mixer input
0 = not selected
1 = selected
Output of DAC to speaker mixer input
0 = not selected
1 = selected
Reserved
Reserved
Reserved
DESCRIPTION
Pre-Production, Rev 3.0, February 2007
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Output Switch
Analogue Outputs
Analogue Outputs
Analogue Outputs
Analogue Outputs
REFER TO
Pre-Production
76