33797 Datasheet, PDF (25/34 Pages) Freescale Semiconductor, Inc – Four Channel Squib Driver IC

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Table 8. Command Programming and Diagnostic Bit Definitions (continued)
Hex
Code
Command
Description
XX ^Programming
Command for
FEN 2 Counter
1 = ON
Command Programming Input and Diagnostic Data Out (Available on Next Command) ⁽²²⁾
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
FEN2 CNT FEN2 CNT FEN2 CNT FEN2 CNT
BIT 7
BIT 6
BIT 5
BIT 4
MS
FEN2 CNT
BIT 3
FEN2 CNT FEN2 CNT FEN2 CNT
BIT 2
BIT 1
BIT 0
LS
Response DATA
OUT
FEN 2 Counter
Programming
Status
FEN2 CNT FEN2 CNT FEN2 CNT FEN2 CNT
BIT 7
BIT 6
BIT 5
BIT 4
MS
FEN2 CNT
BIT 3
FEN2 CNT FEN2 CNT FEN2 CNT
BIT 2
BIT 1
BIT 0
LS
82 ^{Unlock to Test}
1
0
0
0
0
0
1
0
High-Squib Drivers
1A, 1B, 2A, 2B
Response DATA
1
0
0
0
0
0
1
0
Output: Command
Echoed
1X High-Side Driver
0
0
0
1
SQB_ 2B SQB_ 2A SQB_1B SQB_1A
Transistor Test
High-Side High-Side High-Side High-Side
Command
Driver “ON” Driver “ON” Driver “ON” Driver “ON”
Response DATA
0
0
0
0
SQB_2B SQB_2A SQB_1B SQB_1A
OUT
HSDSTAT_2B HSDSTAT_2A HSDSTAT_1B HSDSTAT_1A
High-Side Driver
Transistor Status
V_TRANTST1
83 ^{Unlock to Test Low}
1
0
0
0
0
0
1
1
Squib Drivers 1A,
1B, 2A, and 2B
Response Data
1
0
0
0
0
0
1
1
Output: Command
Echoed
2X Low-Side Driver
0
0
1
0
SQB_ 2B SQB_2A SQB_1B SQB_1A
Transistor Test
Low-Side Low-Side Low-Side Low-Side
Command
Driver “ON” Driver “ON” Driver “ON” Driver “ON”
Response DATA
0
0
0
0
SQB_2B SQB_2A SQB_1B SQB_1A
OUT Low-Side
LSDSTAT_ 2B LSDSTAT_ 2A LSDSTAT_1B LSDSTAT_1A
Driver Transistor
Status V_TRANTST2
Notes
22 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.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33797
25