SH7052 Datasheet, PDF (574/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

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 PXPR
Clear RXPR, RFPR
Transmission of data frame
corresponding to remote frame
End of reception
548
Figure 15.9 Reception Flowchart