NEC V850E/RS1 User Manual page 631

Last in-
massage
pointer
(LIPT)
Last in-
massage
pointer
(LIPT)
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Chapter 16 FCAN Controller
Figure 16-51: Receive History List
Receive history list (RHL)
23
22
Event:
:
- Message buffer 6, 9, 2, and 7
:
:
- Newly received messages
7
6
5
4
Message buffer 7
3
Message buffer 2
2
Message buffer 9
1
Message buffer 6
0
Receive
history list
get pointer
(RGPT)
Receive history list (RHL)
Message buffer1
23
Event:
Message buffer9
22
:
- Reception in message buffer13, 14,
:
- Overflow situation occurs.
:
Message buffer 5
7
Message buffer 8
6
Message buffer 4
5
Message buffer 3
4
Receive
3
history list
Message buffer 6
2
get pointer
Message buffer 11
1
(RGPT)
Message buffer 10
0
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.
User's Manual U16702EE3V2UD00
are read by host processor.
are stored in message buffer
3, 4, and 8. Last in-
massage
pointer
(LIPT)
Event:
- 20 other massages are received.
Message buffer 6 carries last received message.
- Upon reception in message buffer 6, RHL is full.
- ROVF bit is set to 1.
and 15 occurs.
Last in-
massage
pointer
(LIPT)
Receive history list (RHL)
23
22
:
:
:
7
Message buffer 8
6
Message buffer 4
5
Message buffer 3
4
Receive
3
history list
2
get pointer
1
(RGPT)
0
Receive history list (RHL)
Message buffer 1
23
Message buffer 9
22
:
:
:
Message buffer 5
7
Message buffer 8
6
Message buffer 4
5
Message buffer 3
4
Receive
3
history list
Message buffer 15
2
get pointer
Message buffer 11
1
(RGPT)
Message buffer 10
0
ROVF bit = 1
LIPT is blocked
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