HD64F2638F20J Datasheet, PDF (721/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 16 Controller Area Network (HCAN)
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 16-11 shows a flowchart of the HCAN sleep mode.
MCR5 = 1
Bus idle?
No
: Settings by user
: Processing by hardware
Initialize TEC and REC
Bus operation?
No
Yes
IRR12 = 1
IMR12 = 1?
Yes
No
CPU interrupt
Sleep mode clearing method
MCR7 = 0?
No (automatic)
Yes (manual)
Clear sleep mode?
No
GSR3 = 1?
No
Yes
MCR5 = 0
Yes
GSR3 = 1?
No
Yes
MCR5 = 0
Do not access MB
during these steps
11 recessive bits
received?
No
Yes
CAN bus communication possible
Figure 16-11 HCAN Sleep Mode Flowchart
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 671 of 1458