Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 20 CAN CONTROLLER
R01UH0042EJ0500 Rev.5.00 Page 985 of 1513
Aug 12, 2011
As long as the RHL contains 23 or less entries the sequence of occurrence is maintained. If more receptions occur
without the RHL being read by the host processor, a complete sequence of receptions can not be recovered.
Figure 20-30. Receive History List
Last in-
message
pointer
(LIPT)
Receive
history list
get pointer
(RGPT)
- Message buffer 6, 9, 2, and 7
are read by host processor.
- Newly received messages
are stored in message buffer
3, 4, and 8.
Event:
Receive
history list
get pointer
(RGPT)
Last in-
message
pointer
(LIPT)
- 20 other messages are received.
Message buffer 6 carries last received message.
- Upon reception in message buffer 6, RHL is full.
- ROVF bit is set to 1.
Event:
Last in-
message
pointer
(LIPT)
Last in-
message
pointer
(LIPT)
Receive
history list
get pointer
(RGPT)
Receive
history list
get pointer
(RGPT)
Receive history list (RHL)
Message buffer 6
Message buffer 9
Message buffer 2
Message buffer 7
0
1
2
3
4
5
6
7
22
23
:
:
:
Receive history list (RHL)
Message buffer 3
Message buffer 4
Message buffer 8
0
1
2
3
4
5
6
7
22
23
:
:
:
Receive history list (RHL)
Message buffer 10
Message buffer 11
Message buffer 6
Message buffer 3
Message buffer 4
Message buffer 8
Message buffer 5
Message buffer 9
Message buffer 1
0
1
2
3
4
5
6
7
22
23
:
:
:
- Reception in message buffer 13,
14, and 15 occurs.
- Overflow situation occurs.
Event:
Receive history list (RHL)
Message buffer 10
Message buffer 11
Message buffer 15
Message buffer 3
Message buffer 4
Message buffer 8
Message buffer 5
Message buffer 9
Message buffer 1
0
1
2
3
4
5
6
7
22
23
:
:
:
ROVF bit = 1
LIPT is blocked
ROVF bit = 1
LIPT is blocked
ROVF bit = 1 denotes that LIPT equals RGPT − 1 while message buffer number stored to element indicated by LIPT − 1.