Hcan Sleep Mode; Figure 13.13 Hcan Sleep Mode Flowchart - Renesas H8SX/1500 Series Hardware Manual

Section 13 Controller Area Network (HCAN)
13.4.5

HCAN Sleep Mode

The HCAN is provided with an HCAN sleep mode that places the HCAN module in the sleep
state in order to reduce current consumption. Figure 13.13 shows a flowchart of the HCAN sleep
mode.
Initialize TEC and REC
CAN bus communication possible
Rev. 3.00 Mar. 14, 2006 Page 498 of 804
REJ09B0104-0300
MCR5 = 1
Bus idle?
Bus operation?
Yes
IRR12 = 1
IMR12 = 1?
Yes
Sleep mode
clearing method
MCR7 = 0?
Yes (manual)
GSR3 = 1?
Yes
MCR5 = 0
11 recessive bits
received?
Yes

Figure 13.13 HCAN Sleep Mode Flowchart

No
No
No
CPU interrupt
No (automatic)
Clear sleep mode?
Yes
No
GSR3 = 1?
Yes
MCR5 = 0
No
: Settings by user
: Processing by hardware
No
No