SH7055S Datasheet, PDF (607/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Initialization
IRR0 clearing
HCAN port setting
BCR setting
MBCR setting
Mailbox (RAM) initialization
Interrupt settings
Receive data setting
Arbitration field setting
Local acceptance filter settings
: Settings by user
: Processing by hardware
Message reception
No
(Match of identifier
in mailbox?)
Yes
Yes
Same RXPR = 1?
No
No
Data frame?
Yes
RXPR
IRR1 = 1
Unread message
RXPR, RFPR = 1
IRR2 = 1, IRR1 = 1
Yes
IMR1 = 1?
No
Interrupt to CPU
No
RXPR = 1?
Yes
Yes
IMR2 = 1?
No
Interrupt to CPU
No
RXPR = 1?
Yes
Message control read
Message data read
Message control read
Message data read
Clear RXPR
Clear RXPR, RFPR
Transmission of data frame
corresponding to remote frame
End of reception
Figure 16.11 Reception Flowchart
Rev.2.0, 07/03, page 569 of 960