Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 20 CAN CONTROLLER
R01UH0042EJ0500 Rev.5.00 Page 902 of 1513
Aug 12, 2011
<8> Interframe space
The interframe space is inserted after a data frame, remote frame, error frame, or overload frame to separate
one frame from the next.
• The bus state differs depending on the error status.
(a) Error active node
The interframe space consists of a 3-bit intermission field and a bus idle field.
Figure 20-13. Interframe Space (Error Active Node)
R
D
Interframe space
Intermission
(3 bits)
Bus idle
(0 to ∞ bits)
(Frame)(Frame)
Remarks 1. Bus idle: State in which the bus is not used by any node.
2. D: Dominant = 0
R: Recessive = 1
(b) Error passive node
The interframe space consists of an intermission field, a suspend transmission field, and a bus idle field.
Figure 20-14. Interframe Space (Error Passive Node)
R
D
Interframe space
Intermission
(3 bits)
Suspend transmission
(8 bits)
Bus idle
(0 to ∞ bits)
(Frame)(Frame)
Remarks 1. Bus idle: State in which the bus is not used by any node.
Suspend transmission: Sequence of 8 recessive-level bits transmitted from the
node in the error passive status.
2. D: Dominant = 0
R: Recessive = 1
Usually, the intermission field is 3 bits. If the transmitting node detects a dominant level at the third bit of
the intermission field, however, it executes transmission.