h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 478

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 14 Controller Area Network (HCAN)
Note:
Rev. 2.00 Dec. 05, 2005 Page 440 of 724
REJ09B0200-0200
Bit
1
0
Bit Name
IRR9
IRR8
*
Only 1 can be written to clear the flag.
Initial
Value
0
0
R/W
R
R/(W)* Mailbox Empty Interrupt Flag
Description
Unread Interrupt Flag
Status flag indicating that a receive message has been
overwritten before being read.
[Setting condition]
•
[Clearing condition]
•
Status flag indicating that the next transmit message
can be stored in the mailbox.
[Setting condition]
•
[Clearing condition]
•
When UMSR (unread message status register) is
set
Clearing of all bits in UMSR (unread message
status register)
When TXPR (transmit wait register) is cleared by
completion of transmission or completion of
transmission abort
Writing 1