33797 Datasheet, PDF (22/34 Pages) Freescale Semiconductor, Inc – Four Channel Squib Driver IC

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Table 7. Diagnostic Bit Definitions
Hex
Code
Command
Description
00 NOP
Bit 7
0
Bit 6
0
Diagnostic Data Out (Available on Next Command)
Bit 5
Bit 4
Bit 3
Bit 2
0
0
0
0
Bit 1
0
Bit 0
0
70 ^{Squib 1A Current} SQB_1A SQB_1A SQB_1A SQB_1A
Measurement
BIT 7
BIT 6
BIT 5
BIT 4
Time
MS
SQB_1A
BIT 3
SQB_1A
BIT 2
SQB_1A
BIT 1
SQB_1A
BIT 0
LS
71 Squib 1B Current SQB_1B SQB_1B BIT SQB_1B BIT SQB_1B
Measurement
BIT 7
6
5
BIT 4
Time
MS
SQB_1B
BIT 3
SQB_1B
BIT 2
SQB_1B
BIT 1
SQB_1B
BIT 0
LS
72 ^{Squib 2A Current} SQB_2A SQB_2A SQB_2A SQB_2A
Measurement
BIT 7
BIT 6
BIT 5
BIT 4
Time
MS
SQB_2A
BIT 3
SQB_2A
BIT 2
SQB_2A
BIT 1
SQB_2A
BIT 0
LS
73 ^{Squib 2B Current} SQB_2B SQB_2B SQB_2B SQB_2B
Measurement
BIT 7
BIT 6
BIT 5
BIT 4
Time
MS
SQB_2B
BIT 3
SQB_2B
BIT 2
SQB_2B
BIT 1
SQB_2B
BIT 0
LS
79 ^{Squib X Current}
0
0
0
0
SQB_2B SQB_2A SQB_1B SQB_1A
Status
Current Limit Current Limit Current Limit Current Limit
Status
Status
Status
Status
7F Thermal
Thermal
Thermal
Thermal
Thermal
Thermal
Thermal Thermal Thermal
Shutdown Status _{LSDSTAT HSDSTAT LSDSTAT HSDSTAT LSDSTAT HSDSTAT LSDSTAT HSDSTAT}
Thermal_SD
_2B
_2B
_2A
_2A
_1B
_1B
_1A
_1A
C0 ^{VDIAG and High-} RSSLO
Side Safing
Sensor
Diagnostics
RSSHI
V_DIAG _2
VDHI
V_DIAG _2
VDLO
RSSLO
RSSHI
V_DIAG _1
VDHI
V_DIAG _1
VDLO
C1 Squib Short-to- SQB_2B SQB_2B SQB_2A SQB_2A
Ground/Short-to- _{NO_SH_ NO_SH_ NO_SH_ NO_SH_}
Battery
GND
BATT
GND
BATT
Diagnostics
SQB_1B
NO_SH_
GND
SQB_1B
NO_SH_
BATT
SQB_1A
NO_SH_
GND
SQB_1A
NO_SH_
BATT
C2 ^{Low-Side Driver}
0
0
0
0
SQB_LO_2B_ SQB_LO_2A SQB_LO_1B SQB_LO_1A
Continuity Status
CONT
CONT
CONT
CONT
C3 ^{Harness Short-to-} SQB_2B SQB_2B SQB_2A SQB_2A
Ground/ Short-to- OPEN
OPEN
OPEN
OPEN
Battery with
NO_SH_ NO_SH_ NO_SH_ NO_SH_
Squib Open (No
GND
BATT
GND
BATT
Squib Present)
SQB_1B
OPEN
NO_SH_
GND
SQB_1B
OPEN
NO_SH_
BATT
SQB_1A
OPEN
NO_SH_
GND
SQB_1A
OPEN
NO_SH_
BATT
Hex
Code
Command
Description
C5 ^{VFIRE_1B and}
VFIRE_2B
Voltage
Bit 7
0
Bit 6
0
Diagnostic Data Out (Available on Next Command)
Bit 5
Bit 4
Bit 3
Bit 2
0
V_FIRE _B
X
X
Tested
Bit 1
V_HI
Bit 0
V_LO
C6 VDIAG_1 and
VDIAG_2
Diagnostics
V_DIAG_2
V4
V_DIAG_2
V3
V_DIAG_2
V2
V_DIAG_2
V1
V_DIAG_1
V4
V_DIAG_1
V3
V_DIAG_1
V2
V_DIAG_1
V1
33797
22
Analog Integrated Circuit Device Data
Freescale Semiconductor