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L9659 データシート(PDF) 32 Page - STMicroelectronics

部品番号 L9659
部品情報  Octal squib driver ASIC for safety application
PDF  51 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9659 データシート(HTML) 32 Page - STMicroelectronics

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Functional description
L9659
32/51
Doc ID 022048 Rev 2
3.4.5.1 Squib SPI commands
The following are the modes that are supported by the squib L9659 using SPI.
●
Configuration mode
●
Deployment mode
●
Diagnostic mode
●
Monitor mode
The table below is a summary of the modes and the functions that are achieved be sending
the particular MOSI command. The following sections will provide a full description of bit
settings for each mode. All commands and responses use D13 to achieve odd parity.
The squib circuits can be reset over when sending the appropriate configuration commands
via SPI.
Table 15.
Command description summary
Command/mode
Description
Mode bits
D15 D14 D13 D12 D11 D10 D09 D08 D07 - D00
Configuration commands
Config. Mode 1
Current limit programming and
software reset
0
0
P
-
-
0
-
-
-
Config. Mode 2
FEN latch time Programming
0
0
P
-
-
1
-
-
-
Deployment commands
Deployment Mode 1 Arming Command
0
1
P
11001
-
Deployment Mode 2 Firing Command
0
1
P
00000
-
Diagnostic commands
Diagnostic Mode 1
Disable Diagnostic
1
0
P
-
0
0
0
-
-
Diagnostic Mode 2
Short to battery & ground
diagnostics Short between loop
diagnostics
10
P
-
001
-
-
Diagnostic Mode 3
VRESx voltage diagnostics
1
0
P
-
0
1
0
-
-
Diagnostic Mode 4
High Side Safing diagnostics
1
0
P
-
0
1
1
-
-
Diagnostic Mode 5
Squib Resistance Diagnostics
1
0
P
-
1
0
0
-
-
Diagnostic Mode 6
High Squib Resistance Diagnostics
1
0
P
-
1
0
1
-
-
Diagnostic Mode 7
LS driver diagnostics
1
0
P
-
1
1
0
-
-
Diagnostic Mode 8
HS driver diagnostics
1
0
P
-
1
1
1
-
-
Monitor commands
Monitor Mode 1
Deployment status
1
1
P
-
0
0
-
-
-
Monitor Mode 2
Channel current limit measurement
information
11
P
-
0
1
-
-
-
Monitor Mode 3
FENx function status and active
current limit status
11
P
-
1
0
-
-
-
Monitor Mode 4
Revision and L9659 ID
1
1
P
-
1
1
-
-
-
P = Parity bit – all commands and responses will use this bit to achieve odd parity



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