32186 datasheet(652/1032 Pages) RENESAS

652 / 1032 page

CAN MODULE

13-42

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

CAN0 Error Interrupt Request Status Register (CAN0ERIST)

<Address: H’0080 1014>

CAN1 Error Interrupt Request Status Register (CAN1ERIST)

<Address: H’0080 1414>

123456

EIS

PIS

OIS

000

Bit Name

Function

0–4

No function assigned. Fix to "0."

EIS

0: Interrupt not requested

R(Note 1)

CAN bus error interrupt request status bit

1: Interrupt requested

PIS

Error passive interrupt request status bit

OIS

Bus off interrupt request status bit

Note 1: Only writing "0" is effective. Writing "1" has no effect; the bit retains the status it had before the write.

When using CAN interrupts, if the interrupt request sources are associated with errors, this register helps to

know which source generated the interrupt.

(1) EIS (CAN Bus Error Interrupt Request Status) bit (Bit 5)

The EIS bit is set to "1" when a communication error is detected. This bit is cleared by writing "0" in software.

(2) PIS (Error Passive Interrupt Request Status) bit (Bit 6)

The PIS bit is set to "1" when the CAN module goes to an error passive state. This bit is cleared by writing

"0" in software.

(3) OIS (Bus Off Interrupt Request Status) bit (Bit 7)

The OIS bit is set to "1" when the CAN module goes to a bus off passive state. This bit is cleared by writing

"0" in software.

When writing to the CAN error 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.

13.2 CAN Module Related Registers

32186 Datasheet(PDF) 652 Page - Renesas Technology Corp