Hcan Halt Mode; Figure 13.14 Hcan Halt Mode Flowchart - Renesas H8SX/1500 Series Hardware Manual

Section 13 Controller Area Network (HCAN)
13.4.6

HCAN Halt Mode

The HCAN halt mode is provided to enable mailbox settings to be changed without performing an
HCAN hardware or software reset. Figure 13.14 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.
Rev. 3.00 Mar. 14, 2006 Page 500 of 804
REJ09B0104-0300
MCR1 = 1
Bus idle?
Yes
Set MBCR
MCR1 = 0
CAN bus communication possible

Figure 13.14 HCAN Halt Mode Flowchart

No
: Settings by user
: Processing by hardware