NEC V850E/Dx3 Preliminary User's Manual page 724

Chapter 19
When TOVF bit = 1, message
buffer number is stored
(overwritten) to element indicated
by LOPT-1.
724
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Transmit history list (THL)
7
6
5
Last out-message
4
pointer (LOPT)
Message buffer 7
3
2 Message buffer 2
1 Message buffer 9
Message buffer 6
0
Transmit history list (THL)
7
Message buffer 3
6 Message buffer 8
Message buffer 4
5
4 Message buffer 3
3 Message buffer 7
2
Message buffer 2
1
Message buffer 9
Last out-message
0
pointer (LOPT)
Figure 19-30 Transmit history list
Preliminary User's Manual U17566EE1V2UM00
When message buffer 6 is read Transmit history list (THL)
7
6
If transmission from
message buffers 3 and 4 Last
5
is completed out-message
4
pointer (LOPT)
3
2
1
Transmit history list
0
get pointer (TGPT)
Transmit history list(THL)
When transmission from message
7
buffer 3 is completed.
6
5
4
3
2
Transmit
1
history
Last out-message
list get 0
pointer (LOPT)
pointer
(TGPT)
LOPT is locked.
CAN Controller (CAN)
Message buffer 4
Message buffer 3
Message buffer 7
Message buffer 2
Transmit history list
Message buffer 9
get pointer (TGPT)
When THL is full
Message buffer 5
TOVF bit is set.
Message buffer 8
Message buffer 4
Message buffer 3
Message buffer 7
Message buffer 2
Transmit history list
Message buffer 9
get pointer (TGPT)