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SH7052 Datasheet(PDF) 580 Page - Renesas Technology Corp

Part # SH7052
Description  SuperHTM RISC engine
PDF  919 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7052 Datasheet(HTML) 580 Page - Renesas Technology Corp

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15.3.6
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 15.12 shows a flowchart of the HCAN halt mode.
MCR1 = 1
GSR2 = 1?
(Wait until transmission is
completed if in progress)
Bus idle?
CAN bus communication possible
No
MBCR setting
MCR1 = 0
Yes
: Settings by user
: Processing by hardware
Figure 15.12 HCAN Halt Mode Flowchart
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.



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