Fujitsu F2MCTM-16LX Hardware Manual page 476

CHAPTER 21 CAN CONTROLLER
Table 21.4-4 Function of Each Bit of the Last Event Indicator Register (LEIR) (2 / 2)
Bit Name
bit3 MBP3 to MBP0:
to Message buffer
bit0 pointer bits
460
When TCE bit or RCE bit is "1", these bits show the message buffer number (x) to
generating of corresponding the last event. If the NTE bit is set to 1, these bits have no
meaning.
At Write:
"0": Cleared
"1": No effect
At read by the instruction of the read-modify-write type:
Always read "1".
Note:
If LEIR is accessed within an CAN interrupt handler, the event causing the interrupt is
not necessarily the same as indicated by LEIR. In the time from interrupt request to the
LEIR access by the interrupt handler there may occur other CAN events.
Function