WM8974_07 Datasheet, PDF (69/87 Pages) Wolfson Microelectronics plc – Mono CODEC with Speaker Driver

Production Data
REGISTER BIT
ADDRESS
3
LABEL
GPIOPOL
2:0 GPIOSEL
9 (09h)
10 (0Ah)
8:0
8:7
6
DACMU
5:4 DEEMPH
3
DACOSR128
2
AMUTE
1
0
DACPOL
11 (0Bh)
8
7:0 DACVOL
12 (0Ch)
13 (0Dh)
14 (0Eh)
8:0
8:0
8
HPFEN
7
HPFAPP
6:4 HPFCUT
3
ADCOSR128
2:1
DEFAULT
DESCRIPTION
0
000
00
0
00
0
0
0
0
0
11111111
1
0
000
0
00
GPIO Polarity invert
0=Non inverted
1=Inverted
CSB/GPIO pin function select:
000=CSB input
001= Jack insert detect
010=Temp ok
011=Amute active
100=PLL clk o/p
101=PLL lock
110=Reserved
111=Reserved
Reserved
Reserved
DAC soft mute enable
0 = DACMU disabled
1 = DACMU enabled
De-Emphasis Control
00 = No de-emphasis
01 = 32kHz sample rate
10 = 44.1kHz sample rate
11 = 48kHz sample rate
DAC oversample rate select
0 = 64x (lowest power)
1 = 128x (best SNR)
DAC auto mute enable
0 = auto mute disabled
1 = auto mute enabled
Reserved
DAC Polarity Invert
0 = No inversion
1 = DAC output inverted
Reserved
DAC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
Reserved
Reserved
High Pass Filter Enable
0=disabled
1=enabled
Select audio mode or application mode
0=Audio mode (1^st order, fc = ~3.7Hz)
1=Application mode (2^nd order, fc = HPFCUT)
Application mode cut-off frequency
See Table 11 for details.
ADC oversample rate select
0 = 64x (lowest power)
1 = 128x (best SNR)
Reserved
w
WM8974
REFER TO
General Purpose
Input Output
General Purpose
Input Output
Output Signal Path
Output Signal Path
Power
Management
Output Signal Path
Output Signal Path
Output Signal Path
Analogue to Digital
Converter (ADC)
Analogue to Digital
Converter (ADC)
Analogue to Digital
Converter (ADC)
Power
Management
PD Rev 4.2 March 2007
69