SH7055S Datasheet, PDF (611/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

16.3.5 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 16.13 shows a flowchart of the HCAN sleep mode.
MCR5 = 1
Bus idle?
No
Yes
Initialize TEC and REC
No
Bus operation?
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
CPU interrupt
No
11 recessive bits?
Yes
CAN bus communication possible
: Settings by user
: Processing by hardware
Figure 16.13 HCAN Sleep Mode Flowchart
Rev.2.0, 07/03, page 573 of 960