32174 datasheet(98/881 Pages) RENESAS

98 / 881 page

4-3

32170/32174 Group User's Manual (Rev. 2.1)

EIT

4.2 EIT Event

4.2.1 Exception

(1) Reserved Instruction Exception (RIE)

Reserved Instruction Exception (RIE) is generated when execution of a reserved instruction

(unimplemented instruction) is detected.

(2) Address Exception (AE)

Address Exception (AE) is generated when an attempt is made to access a misaligned address

in Load or Store instructions.

4.2.2 Interrupt

(1) Reset Interrupt (RI)

____________

Reset Interrupt (RI) is always accepted by entering the RESET signal. The reset interrupt is

assigned the highest priority.

(2) System Break Interrupt (SBI)

System Break Interrupt (SBI) is an emergency interrupt which is used when power outage is

detected or a fault condition is notified by an external watchdog timer. This interrupt can only be

used in cases when after interrupt processing, control will not return to the program that was

being executed when the interrupt occurred.

(3) External Interrupt (EI)

External Interrupt (EI) is requested from internal peripheral I/Os managed by the interrupt

controller. The internal interrupt controller manages these interrupts by assigning each one of

eight priority levels including an interrupt-disabled state.

4.2.3 Trap

Traps are software interrupts which are generated by executing the TRAP instruction. Sixteen

distinct vector addresses are provided corresponding to TRAP instruction operands 0-15.

32174 Datasheet(PDF) 98 Page - Renesas Technology Corp