SH7052 Datasheet, PDF (578/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

15.3.5 HCAN Sleep Mode
The HCAN is provided with an HCAN sleep mode that places the HCAN module in the sleep
state to reduce current dissipation. Figure 15.11 shows a flowchart of the HCAN sleep mode.
MCR5 = 1
No
Bus idle?
Yes
Initialize TEC and REC
Bus operation?
No
Yes
IRR12 = 1
No
IMR12 = 1?
Yes
CPU interrupt
Sleep mode clearing method
MCR7 = 0?
No (automatic)
Yes (manual)
MCR5 = 0
No
Clear sleep mode?
Yes
MCR5 = 0
No
11 recessive bits?
Yes
CAN bus communication possible
: Settings by user
: Processing by hardware
Figure 15.11 HCAN Sleep Mode Flowchart
552