ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
660
of 928
Rev1.09
IS
D
9
410
0
S
ER
IE
S
T
E
C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
I2C Wake-up Control Register (I2C_WKCTL)
Register
Offset
R/W Description
Reset Value
I2C_WKCTL
0x3C
R/W I
2
C Wake-up Control Register
0x0000_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
7
6
5
4
3
2
1
0
NHDBUSEN
Reserved
WKEN
Bits
Description
[31:8]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[7]
NHDBUSEN
I
2
C No Hold BUS Enable Bit
0 = I
2
C hold bus after wake-up
1= I
2
C don’t hold bus after wake-up
Note:
I
2
C controller could response when WKIF event is not clear, it may cause error data
transmitted or received. If data transmitted or received when WKIF event is not clear, user
must reset I
2
C controller and execute the original operation again.
[6:1]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[0]
WKEN
I
2
C Wake-up Enable Bit
0 = I
2
C wake-up function Disabled.
1= I
2
C wake-up function Enabled.
