ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
661
of 928
Rev1.09
IS
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S
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IE
S
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C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
I2C Wake-up Status Register (I2C_WKSTS)
Register
Offset
R/W Description
Reset Value
I2C_WKSTS
0x40
R/W I
2
C Wake-up Status 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
Reserved
WRSTSWK
WKAKDONE
WKIF
Bits
Description
[31:3]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[2]
WRSTSWK
Read/Write Status Bit in Address Wakeup Frame
0 = Write command be record on the address match wakeup frame.
1 = Read command be record on the address match wakeup frame.
Note:
This bit will be cleared when software can write 1 to
WKAKDONE bit.
[1]
WKAKDONE
Wakeup Address Frame Acknowledge Bit Done
0 = The ACK bit cycle of address match frame isn’t done.
1 = The ACK bit cycle of address match frame is done in power-down.
Note:
This bit can’t release WKIF. Software can write 1 to clear this bit.
[0]
WKIF
I
2
C Wake-up Flag
When chip is woken up from Power-down mode by I
2
C, this bit is set to 1. Software can write
1 to clear this bit.
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