h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 505

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

14.4.6
The HCAN halt mode is provided to enable mailbox settings to be changed without performing an
HCAN hardware or software reset. Figure 14.14 shows a flowchart of the HCAN halt mode.
HCAN halt mode is entered by setting the halt request bit (MCR1) to 1 in the master control
register (MCR). If the CAN bus is operating, the transition to HCAN halt mode is delayed until
the bus becomes idle.
HCAN halt mode is cleared by clearing MCR1 to 0.
HCAN Halt Mode
CAN bus communication possible
Figure 14.14 HCAN Halt Mode Flowchart
Set MBCR
MCR1 = 1
MCR1 = 0
Bus idle?
Yes
No
Section 14 Controller Area Network (HCAN)
Rev. 2.00 Dec. 05, 2005 Page 467 of 724
: Settings by user
: Processing by hardware
REJ09B0200-0200