ISD94100 Series Technical Reference Manual
Sep 9, 2019
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6.19.7 Register Description
DMIC Control Register (DMIC_CTL)
Register
Offset
R/W Description
Reset Value
DMIC_CTL
0x00
R/W DMIC Control Register
0xB7CD_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
LCHEDGE23 LCHEDGE01
7
6
5
4
3
2
1
0
Reserved
OSR
CHEN3
CHEN2
CHEN1
CHEN0
Bits
Description
[31:10]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write
with reset value.
[9]
LCHEDGE23
Channel 23 Data Latch Edge
The data of DMIC channel 2 and channel 3 is latched on DMIC_DATA1 pin. This bit is
used to select the data of DMIC channel 2 and channel 3 is latched on rising or falling
edge of DMIC_CLK (DMIC bus clock).
0 = The data of channel 2 is latched on falling edge of DMIC_CLK. The data of channel
3 is latched on rising edge of DMIC_CLK.
1 = The data of channel 2 is latched on rising edge of DMIC_CLK. The data of channel
3 is latched on falling edge of DMIC_CLK.
[8]
LCHEDGE01
Channel 01 Data Latch Edge
The data of DMIC channel 0 and channel 1 is latched on DMIC_DATA0 pin. This bit is
used to select the data of DMIC channel 0 and channel 1 is latched on rising or falling
edge of DMIC_CLK (DMIC bus clock).
0 = The data of channel 0 is latched on falling edge of DMIC_CLK. The data of channel
1 is latched on rising edge of DMIC_CLK.
1 = The data of channel 0 is latched on rising edge of DMIC_CLK. The data of channel
1 is latched on falling edge of DMIC_CLK.
[7]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write
with reset value.
[6:4]
OSR
OSR Setting
000 = Down sample 32
001 = Down sample 64
010 = Down sample 128
011 = Down sample 256
100 = Down sample 100 or 50
Others = Reserved. Do not use.
Содержание ISD94100 Series
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