Renesas H8S Series Hardware Manual page 439

Bit Bit Name Initial Value
1 IRR9 0
0 IRR8 0
Note: * Only 1 can be written to clear the flag.
Section 15 Controller Area Network (HCAN)
R/W Description
R Unread Interrupt Flag
Status flag indicating that a receive message has
been overwritten before being read.
[Setting condition]
•
When UMSR (unread message status register) is
set
[Clearing condition]
•
Clearing of all bits in UMSR (unread message
status register)
R/(W) * Mailbox Empty Interrupt Flag
Status flag indicating that the next transmit message
can be stored in the mailbox.
[Setting condition]
•
When TXPR (transmit wait register) is cleared by
completion of transmission or completion of
transmission abort
[Clearing condition]
•
Writing 1
Rev. 6.00 Mar 15, 2006 page 403 of 570
REJ09B0211-0600