h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 720

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 Controller Area Network (HCAN)
Rev. 6.00 Feb 22, 2005 page 660 of 1484
REJ09B0103-0600
unread interrupt flag (IRR9) in the interrupt mask register (IMR) is set to the interrupt enable
value at this time, an interrupt can be sent to the CPU. Figure 16-10 shows a flowchart of
unread message overwriting.
Message control/message data read
Unread message overwrite
Interrupt to CPU
Figure 16-10 Unread Message Overwrite Flowchart
Clear IRR9
UMSR = 1
IMR9 = 1?
IRR9 = 1
End
No
Yes
: Settings by user
: Processing by hardware