HD64F2636F20 Datasheet, PDF (685/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 16 Controller Area Network (HCAN)
Bit 1—Unread Interrupt Flag (IRR9): Status flag indicating that a receive message has been
overwritten while still unread.
Bit 1: IRR9
0
1
Description
[Clearing condition]
• Clearing of all bits in UMSR (unread message status register)
(Initial value)
Unread message overwrite
[Setting condition]
• When UMSR (unread message status register) is set
Bit 0—Mailbox Empty Interrupt Flag (IRR8): Status flag indicating that the next transmit
message can be stored in the mailbox.
Bit 0: IRR8
0
1
Description
[Clearing condition]
• Writing 1
(Initial value)
Transmit message has been transmitted or aborted, and new message can
be stored
[Setting condition]
• When TXPR (transmit wait register) is cleared by completion of
transmission or completion of transmission abort
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 635 of 1458