h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 685

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

Bit 1—Unread Interrupt Flag (IRR9): Status flag indicating that a receive message has been
overwritten while still unread.
Bit 0—Mailbox Empty Interrupt Flag (IRR8): Status flag indicating that the next transmit
message can be stored in the mailbox.
Bit 1: IRR9
0
1
Bit 0: IRR8
0
1
Description
[Clearing condition]
Unread message overwrite
[Setting condition]
Description
[Clearing condition]
Transmit message has been transmitted or aborted, and new message can
be stored
[Setting condition]
Clearing of all bits in UMSR (unread message status register)
When UMSR (unread message status register) is set
Writing 1
When TXPR (transmit wait register) is cleared by completion of
transmission or completion of transmission abort
Section 16 Controller Area Network (HCAN)
Rev. 6.00 Feb 22, 2005 page 625 of 1484
REJ09B0103-0600
(Initial value)
(Initial value)