WM8998 Datasheet, PDF (47/307 Pages) Wolfson Microelectronics plc – High Performance Audio Hub CODEC

Production Data
WM8998
REGISTER BIT
ADDRESS
LABEL
R788
(0314h)
IN1R
Control
15 IN1R_HPF
7:1 IN1R_PGA_VOL
[6:0]
R789
(0315h)
ADC
Digital
Volume
1R
R790
(0316h)
DMIC1R
Control
R792
(0318h)
IN2L
Control
14:13 IN1R_SRC [1:0]
5:0 IN1R_DMIC_DLY
[5:0]
15 IN2_HPF
14:13 IN2_OSR [1:0]
DEFAULT
DESCRIPTION
0
Input Path 1 (Right) HPF Enable
0 = Disabled
1 = Enabled
40h
Input Path 1 (Right) PGA Volume
(Applicable to analogue inputs only)
00h to 3Fh = Reserved
40h = 0dB
41h = 1dB
42h = 2dB
… (1dB steps)
5F = 31dB
60h to 7Fh = Reserved
00
Input Path 1 (Right) Source
00 = Differential (IN1ARP - IN1ARN)
01 = Single-ended (IN1ARP)
10 = Differential (IN1BRP-IN1BRN)
11 = Single-ended (IN1BRP)
00h
Input Path 1 (Right) Digital Delay
(Applicable to digital input only)
LSB = 1 sample, Range is 0 to 63.
(Sample rate is controlled by IN1_OSR.)
0
Input Path 2 HPF Enable
0 = Disabled
1 = Enabled
01
Input Path 2 DMIC Oversample Rate
When analogue input is selected
(IN1_MODE=0), this bit controls the
performance mode
00 = Low Power mode
01 = High Performance mode
1X = Reserved
12:11 IN2_DMIC_SUP
[1:0]
10 IN2_MODE
When digital microphone input is selected
(IN2_MODE=1), this field controls the
sample rate as below:
00 = 1.536MHz
01 = 3.072MHz
10 = Reserved
11 = 768kHz
When IN2_OSR=11, the Input Path
sample rate (for all input paths) must be in
the range 8kHz to 16kHz.
00
Input Path 2 DMIC Reference Select
(Sets the DMICDAT2 and DMICCLK2
logic levels)
00 = MICVDD
01 = MICBIAS1
10 = MICBIAS2
11 = MICBIAS3
0
Input Path 2 Mode
0 = Analogue input
1 = Digital input
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PD, October 2014, Rev 4.0
47