mc33742 Freescale Semiconductor, Inc, mc33742 Datasheet - Page 38

• Manufacturer Part Number: mc33742
• Description: Mc33742 System Basis Chip Sbc With Enhanced High-speed Can Transceiver
• Manufacturer: Freescale Semiconductor, Inc

Table 11. Short to GND, Short to VSUP , and Short to 5.0 V (VDD) Detection Truth Table
38
33742
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Failure Description
CANH to VSUP
CANL to VSUP
CANH to GND
CANH to VDD
CANL to GND
CANL to VDD
No failure
No failure
No failure
Diagnostic
TXD
L5 (Threshold VDD- 0.43 V) H5 (Threshold VDD- 0.43 V) L5 (Threshold VDD- 0.43 V)
Lb (Threshold V
Lg (Threshold 1.75 V)
Logic
1
0
0
0
1
1
0
1
1
Lg
Hg
Driver Recessive State
SUP
L5
H5
Hb
Lb
- 2.0 V) Hb (Threshold V
Vrg
Vrg
Figure 24. CAN Bus Simplified Structure
Vr5
Vr5
Vrvb
Vrvb
Hg (Threshold 1.75 V)
VDD
CANH
CANL
1
0
0
0
1
1
0
1
1
SUP
- 2.0 V) Lb (Threshold V
Lg (Threshold 1.75 V)
CANH Dominant Level (3.6 V)
CANL Dominant Level (1.4 V)
0
0
0
0
1
0
0
1
0
Recessive Level (2.5 V)
Analog Integrated Circuit Device Data
SUP
Driver Dominant State
Vrvb (V
V
Vr5 (V
- 2.0 V) Hb (Threshold V
SUP
Vrg (1.75 V)
GND (0.0 V)
(12 V–14 V)
V
DD
SUP
DD
Freescale Semiconductor
- 0.43 V)
(Threshold VDD- 0.43 V)
Hg (Threshold 1.75 V)
- 2.0 V)
(5.0 V)
H5
1
1
0
0
1
1
0
1
1
SUP
-2.0 V)