SH7052 Datasheet, PDF (567/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

Initialization (after hardware reset only)
• IRR0 clearing
• HCAN port setting
• BCR setting
• MBCR setting
• Mailbox initialization
• Message transmission method setting
Interrupt settings
Transmit data setting
• Arbitration field setting
• Control field setting
• Data field setting
Message transmission wait
• TXPR setting
Bus idle?
No
Yes
Message transmission
GSR2 = 0 (during transmission only)
Transmission completed?
No
Yes
IMR8 = 1?
Yes
No
Interrupt to CPU
TXACK = 1?
No
Yes
Clear TXACK
Clear IRR8
End of transmission
: Settings by user
: Processing by hardware
Figure 15.7 Transmission Flowchart
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