32186 datasheet(650/1032 Pages) RENESAS

650 / 1032 page

CAN MODULE

13-40

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

When using CAN interrupts, this register helps to know which slot requested an interrupt.

• Slots set for transmission

The corresponding bit is set to "1" when the CAN module finished sending. This bit is cleared by writing "0"

in software.

• Slots set for reception

The corresponding bit is set to "1" when the CAN module finished receiving and finished storing the re-

ceived message in the message slot. This bit is cleared by writing "0" in software.

When writing to the CAN slot interrupt request status, make sure only the bits to be cleared are set to "0" and

all other bits are set to "1." Those bits that have been set to "1" are unaffected by writing in software and retain

the value they had before the write.

Notes: • If the automatic response function is enabled for remote frame receive slots, the request status

is set after the CAN module finished receiving a remote frame and after it finished sending a

data frame.

• For remote frame transmit slots, the request status is set after the CAN module finished send-

ing a remote frame and after it finished receiving a data frame.

• If the request status is set by an interrupt request at the same time it is cleared in software, the

former has priority so that the request status is set.

13.2 CAN Module Related Registers

32186 Datasheet(PDF) 650 Page - Renesas Technology Corp