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L9680 データシート(PDF) 99 Page - STMicroelectronics

部品番号 L9680
部品情報  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  286 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 データシート(HTML) 99 Page - STMicroelectronics

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DS11615 Rev 7
99/286
L9680
SPI interfaces
285
7.4.25
WD2 seed read command register (WD2_SEED)
ID:
33
Type:
R
Read:
-
Write:
3300
7.4.26
WD2 key write command register (WD2_KEY)
ID:
34
Type:
W
Read:
-
Write:
0068
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MOSI
-
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
MISO
0
0
0
0
WD2_PREV_KEY[7:0]
WD2_SEED[7:0]
N/A N/A N/A
WD2_PREV_KEY[7:0] $0D $0D $0D Previous WD2 key value - stored key from previous comparison
WD2_SEED[7:0] $F0 $F0 $F0 Random WD2 seed value - generated from a free-running 8-bit counter
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MOSI
-
X
X
X
X
X
X
X
X
KEY[7:0]
MISO
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N/A N/A N/A
KEY[7:0]
$0D $0D $0D
Previous WD2 key value - stored key from previous comparison
(correct value is derived from WD2_KEY = WD2_SEED ‡ WD2_PREV_KEY
+ $01 where ‡ denotes a bit-wise XOR)



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