WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 95

• Manufacturer Part Number: WM8978
• Description: The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
• Manufacturer: Wolfson Microelectronics Ltd.

Preliminary Technical Data
w
49 (31h)
50 (32h)
REGISTER
ADDRESS
6:4
3
2:0
8:7
6
5
4
3
2
1
0
8:6
5
BIT
R2_2BOOSTVOL
AUXR2BOOSTVOL
DACL2RMIX
DACR2LMIX
OUT4BOOST
OUT3BOOST
SPKBOOST
TSDEN
VROI
AUXLMIXVOL
AUXL2LMIX
LABEL
000
0
000
00
0
0
0
0
0
1
0
000
0
DEFAULT
Controls the R2 pin to the right channel 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
Controls the auxilliary amplifer to the right
channel 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
Left DAC output to right output mixer
0 = not selected
1 = selected
Right DAC output to left output mixer
0 = not selected
1 = selected
0 = OUT4 output gain = -1;
1 = OUT4 output gain = +1.5
0 = OUT3 output gain = -1;
1 = OUT3 output gain = +1.5
0 = speaker gain = -1;
1 = speaker gain = +1.5;
Thermal Shutdown Enable
0 : thermal shutdown disabled
1 : thermal shutdown enabled
VREF (AVDD/2 or 1.5xAVDD/2) to analogue
output resistance
0: approx 1k
1: approx 30 k
Aux left channel input to left mixer volume
control:
000 = -15dB
001 = -12dB
…
101 = 0dB
110 = +3dB
111 = +6dB
Left Auxilliary input to left channel output mixer:
0 = not selected
1 = selected
DC = AVDD / 2
DC = 1.5 x AVDD / 2
DC = AVDD / 2
DC = 1.5 x AVDD / 2
DC = AVDD / 2
DC = 1.5 x AVDD / 2
DESCRIPTION
PTD Rev 2.6 November 2005
Input Signal
Path
Input Signal
Path
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
REFER TO
WM8978
95