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MC33797 Fiches technique(PDF) 24 Page - Freescale Semiconductor, Inc

No de pièce MC33797
Description  Four Channel Squib Driver IC
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC33797 Fiches technique(HTML) 24 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
24
Freescale Semiconductor
33797
FUNCTIONAL DESCRIPTION
FUNCTIONAL DEVICE OPERATION
Hex
Code
Command
Description
Command Programming Input and Diagnostic Data Out (Available on Next Command) (23)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
XX
Programming
Command for
FEN 2 Counter
1=ON
FEN2 CNT
BIT 7
MS
FEN2 CNT
BIT 6
FEN2 CNT
BIT 5
FEN2 CNT
BIT 4
FEN2 CNT
BIT 3
FEN2 CNT
BIT 2
FEN2 CNT
BIT 1
FEN2 CNT
BIT 0
LS
Response DATA
OUT
FEN 2 Counter
Programming
Status
FEN2 CNT
BIT 7
MS
FEN2 CNT
BIT 6
FEN2 CNT
BIT 5
FEN2 CNT
BIT 4
FEN2 CNT
BIT 3
FEN2 CNT
BIT 2
FEN2 CNT
BIT 1
FEN2 CNT
BIT 0
LS
82
Unlock to Test
High-Squib Drivers
1A, 1B, 2A, 2B
1
0
0
0
0
0
1
0
Response DATA
Output: Command
Echoed
1
0
0
0
0
0
1
0
1X
High-Side Driver
Transistor Test
Command
0
0
0
1
SQB_ 2B
High-Side
Driver “ON”
SQB_ 2A
High-Side
Driver “ON”
SQB_1B
High-Side
Driver “ON”
SQB_1A
High-Side
Driver “ON”
Response DATA
OUT
High-Side Driver
Transistor Status
VTRANTST1
0
0
0
0
SQB_2B
HSDSTAT_2B
SQB_2A
HSDSTAT_2A
SQB_1B
HSDSTAT_1B
SQB_1A
HSDSTAT_1A
83
Unlock to Test Low
Squib Drivers 1A,
1B, 2A, and 2B
1
0
0
0
0
0
1
1
Response Data
Output: Command
Echoed
1
0
0
0
0
0
1
1
2X
Low-Side Driver
Transistor Test
Command
0
0
1
0
SQB_ 2B
Low-Side
Driver “ON”
SQB_2A
Low-Side
Driver “ON”
SQB_1B
Low-Side
Driver “ON”
SQB_1A
Low-Side
Driver “ON”
Response DATA
OUT Low-Side
Driver Transistor
Status VTRANTST2
0
0
0
0
SQB_2B
LSDSTAT_ 2B
SQB_2A
LSDSTAT_ 2A
SQB_1B
LSDSTAT_1B
SQB_1A
LSDSTAT_1A
Notes
23.
The second byte for command programming will be treated as a NOP if any FET is firing. The programming commands have to be
sequential or they will be treated as a NOP.
Hex
Code
Command
Description
Command Programming Input and Diagnostic Data Out (Available on Next Command) (24)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Table 8. Command Programming and Diagnostic Bit Definitions (continued)


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