CHAPTER 19 FCAN CONTROLLER (V850/SC3)
User’s Manual U15109EJ3V0UD
645
<8> Interframe space
The interframe space is inserted after the data frame, remote frame, error frame, and overload frame to
separate one frame from the next.
•
The bus status differs depending on the error status.
(a) Error active node
The error active node is composed of a 3-bit intermission field and a bus idle field.
Figure 19-21. Interframe Space (Error Active Node)
R
D
Interframe space
Intermission
(3 or 2 bits)
Bus idle
(0 or more bits)
(Frame)
(Frame)
Remarks 1.
Bus idle: Status in which the bus is not used by nodes.
2.
D: Dominant = 0
R: Recessive = 1
(b) Error passive node
The error passive node is composed of an intermission field, suspend transmission field, and bus
idle field.
Figure 19-22. Interframe Space (Error Passive Node)
R
D
Interframe space
Intermission
(3 or 2 bits)
Suspend transmission
(8 bits)
Bus idle
(0 or more bits)
(Frame)
(Frame)
Remarks 1.
Bus idle:
Status in which the bus is not used by nodes.
Suspend transmission: 8-bit recessive transmitted from the node in the error passive status.
2.
D: Dominant = 0
R: Recessive = 1