h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 495

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

14.4.3
Messages are transmitted using mailboxes 1 to 15. The transmission procedure after initial settings
is described below, and a transmission flowchart is shown in figure 14.9.
Message Transmission
Initialization (after hardware reset only)
Message transmission method setting
GSR2 = 0 (during transmission only)
Message transmission wait
Transmission completed?
Arbitration field setting
Message transmission
Transmit data setting
Mailbox initialization
End of transmission
Control field setting
Figure 14.9 Transmission Flowchart
Interrupt settings
Data field setting
Interrupt to CPU
MBCR setting
TXPR setting
Clear TXACK
BCR setting
TXACK = 1
Clear IRR0
Clear IRR8
IMR8 = 1?
Bus idle?
IRR8 = 1
Yes
Yes
No
Yes
No
No
Section 14 Controller Area Network (HCAN)
Rev. 2.00 Dec. 05, 2005 Page 457 of 724
: Settings by user
: Processing by hardware
REJ09B0200-0200