Hcan Sleep Mode; Figure 15.12 Unread Message Overwrite Flowchart - Hitachi H8S/2628 Hardware Manual

15.4.5

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 15.13 shows a flowchart of the HCAN sleep
mode.
Rev. 1.0, 09/02, page 396 of 568
Unread message overwrite
UMSR = 1
IRR9 = 1
IMR9 = 1?
No
Interrupt to CPU
Clear IRR9
Message control/message data read
End

Figure 15.12 Unread Message Overwrite Flowchart

: Settings by user
: Processing by hardware
Yes