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L9678P Datasheet(PDF) 67 Page - STMicroelectronics

Part # L9678P
Description  Automotive user configurable airbag IC
PDF  203 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Datasheet(HTML) 67 Page - STMicroelectronics

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DocID029274 Rev 3
67/203
L9678P, L9678P-S
SPI interface
202
5.1.13
Device version register (VERSION_ID)
Address:
27
Type:
R
Buffer:
$2700
Reset:
-
5.1.14
Watchdog retry configuration register (WD_RETRY_CONF)
Address:
28
Type:
RW
Buffer:
$2800
Reset:
$0050
Cleared upon SSM_RESET or SPI read. Set when GND loss is detected
during deployment or loop diag's (HS sw test, LS sw test, squib resistance)
0 Loss of ground not detected
1 Loss of ground detected
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
0
0
0
0
0
DEVICE ID
0
0
VERSN
DEVICE ID
-
-
-
Identification of the device
Static value - never updated
001 Low end
010 Medium end
011 High end
VERSN
-
-
-
Identification of the silicon version
000011
CB version
other codes previous versions
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MOSI
-
WD1_RETRY_TH
MISO
0
0
0
0
00
0
0
0
0
0
0
00
0
0
0
WD1_RETRY_TH
WD1_RETRY_TH
77
-
WD1 retry counter threshold (number of WD errors permitted before latching
WD1_LOCKOUT=1)



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