WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 87

• 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
13 (0Dh)
14 (0Eh)
15 (0Fh)
16 (10h)
REGISTER
ADDRESS
8
7:4
3:0
8
7
6:4
3
2
1
0
8
7:0
8
7:0
BIT
JD_EN1
JD_EN0
HPFEN
HPFAPP
HPFCUT
ADCOSR
128
ADCRPOL
ADCLPOL
ADCVU
ADCVOLL
ADCVU
ADCVOLR
LABEL
0
0000
0000
1
0
000
0
0
0
0
N/A
11111111
N/A
11111111
DEFAULT
Reserved
Output enabled when selected jack detection
input is logic 1
[4]= OUT1_EN_1
[5]= OUT2_EN_1
[6]= OUT3_EN_1
[7]= OUT4_EN_1
Output enabled when selected jack detection
input is logic 0.
[0]= OUT1_EN_0
[1]= OUT2_EN_0
[2]= OUT3_EN_0
[3]= OUT4_EN_0
High Pass Filter Enable
0=disabled
1=enabled
Select audio mode or application mode
0=Audio mode (1
1=Application mode (2
Application mode cut-off frequency
See Table 17 for details.
ADC oversample rate select
0 = 64x (lowest power)
1 = 128x (best SNR)
Reserved
ADC right channel polarity adjust:
0=normal
1=inverted
ADC left channel polarity adjust:
0=normal
1=inverted
ADC left and ADC right volume do not update
until a 1 is written to ADCVU (in reg 16 or 17)
Left ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
ADC left and ADC right volume do not update
until a 1 is written to ADCVU (in reg 16 or 17)
Right ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
DESCRIPTION
st
order, fc = ~3.7Hz)
nd
order, fc = HPFCUT)
PTD Rev 2.6 November 2005
Output
Switching
(Jack Detect)
Output
Switching
(Jack Detect)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Analogue to
Digital
Converter
(ADC)
Power
Management
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)
Analogue to
Digital
Converter
(ADC)
REFER TO
WM8978
87