wm8775 Wolfson Microelectronics plc, wm8775 Datasheet - Page 32

• Manufacturer Part Number: wm8775
• Description: 24-bit, 96khz Adc With 4 Channel I/p Multiplexer
• Manufacturer: Wolfson Microelectronics plc

WM8775
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Timeout Clock
Master Mode
REGISTER
Powerdown
ADDRESS
R13 (0Dh)
R11 (0Bh)
R7 (07h)
0000111
Interface
0001011
12 (0Ch)
0001100
0001101
Disable
Control
Control
Control
BIT
5:4
1:0
2:0
3
6
8
8
6
3
2
3
0
1
ADCRATE[2:0]
ADCFMT[1:0]
ADCWL[1:0]
ADCMCLK
ADCOSR
ADCBCP
ADCHPD
ADCLRP
ADCMS
ADCPD
LABEL
PWDN
AINPD
TOD
DEFAULT
010
10
10
0
0
0
0
0
0
0
0
0
0
ADC Analogue PGA Zero cross detect timeout disable
0 : Timeout enabled
1: Timeout disabled
Interface format select
ADCLRC Polarity or DSP mode A/B select
In left/right/ I
ADCLRC Polarity (normal)
0 : normal ADCLRC polarity
1: inverted ADCLRC polarity
BITCLK Polarity
Input Word Length
ADCMCLK Polarity
0 : non-inverted
1: inverted
ADC High pass Filter Disable:
Master Mode MCLK:ADCLRC ratio select:
ADC oversample rate select
Maser/Slave interface mode select
0: Slave Mode – ADCLRC and BCLK are inputs
1: Master Mode – ADCLRC and BCLK are outputs
Chip Powerdown Control (works together with ADCD):
ADC powerdown:
Input mux and buffer powerdown
0: Normal - ADCLRC sampled on rising edge of BCLK;
DOUT changes on falling edge of BCLK.
1: Inverted - ADCLRC sampled on falling edge of BCLK;
DOUT changes on rising edge of BCLK.
00: 16-bit Mode
01: 20-bit Mode
10: 24-bit Mode
11: 32-bit Mode (not supported in right justified mode)
0: High pass Filter enabled
1: High pass Filter disabled
010: 256fs
011: 384fs
100: 512fs
101: 768fs
0: 128x oversampling
1: 64x oversampling
00: right justified mode
01: left justified mode
10: I
11: DSP mode
0: All circuits running, outputs are active
1: All circuits in power save mode, outputs muted
0: ADC enabled
1: ADC disabled
0: Input mux and buffer enabled
1: Input mux and buffer powered down
2
2
S modes:
S mode
DESCRIPTION
DSP Mode
0: DSP mode A
1: DSP mode B
PD, Rev 4.4, October 2008
Production Data
32