Cirrus Logic WM8940 Manual page 78

REGISTER BIT LABEL
ADDRESS
5:0 INPPGAVOL
46 (2Eh) 15:0
47 (2Fh) 15:9
8 PGABOOST
7
6:4 MICP2BOOSTVOL 000
3
2:0 AUX2BOOSTVOL 000
48 (30h) 15:0
49 (31h) 15:2
1 TSDEN
0 VROI
50 (32h) 15:6
5 AUX2SPK
4:2
1 BYP2SPK
0 DAC2SPK
51 (33h) 15:0
52 (34h) 15:0
53 (35h) 15:0
78
DEFAULT
010000 Input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = 35.25dB
0000h Reserved
00h Reserved
0 Input Boost
0 = PGA output has +0dB gain through input BOOST
stage.
1 = PGA output has +20dB gain through input BOOST
stage.
0 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
0 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
0000h Reserved
0000h Reserved
1 Thermal Shutdown Enable
0 : thermal shutdown disabled
1 : thermal shutdown enabled
0 VREF (AVDD/2 or 1.5xAVDD/2) to analogue output
resistance
0: approx 1k
1: approx 30 k
000h Reserved
0 Output of auxiliary amplifier to speaker mixer input
0 = not selected
1 = selected
000 Reserved
0 Bypass path (output of input boost stage) to speaker
mixer input
0 = not selected
1 = selected
0 Output of DAC to speaker mixer input
0 = not selected
1 = selected
0000h Reserved
0000h Reserved
0000h Reserved
DESCRIPTION
WM8940
REFER TO
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Output Switch
Analogue Outputs
Analogue Outputs
Analogue Outputs
Analogue Outputs
Rev 4.4