32170 datasheet(102/881 Pages) RENESAS

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4-7

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

4.5 Acceptance of EIT Event

When an EIT event occurs, the M32R/ECU suspends the program it has hitherto been executing

and branches to EIT processing by the relevant handler. Conditions under which each EIT event

occurs and the timing at which they are accepted are shown below.

Table 4.5.1 Acceptance of EIT Events

EIT Event

Type of Processing

Acceptance Timing

Values Set in BPC Register

Reserved Instruction

Instruction processing-

During instruction

PC value of the instruction

Exception (RIE)

canceled type

execution

which generated RIE

Address Exception (AE)

Instruction processing-

During instruction

PC value of the instruction

canceled type

execution

which generated AE

Reset Interrupt (RI)

Instruction processing-

Each machine cycle

Indeterminate value

aborted type

System Break

Instruction processing-

Break in instructions

PC value of the next instruction

Interrupt (SBI)

completed type

(only word boundaries)

External Interrupt (EI)

Instruction processing-

Break in instructions

PC value of the next instruction

completed type

(only word boundaries)

Trap (TRAP)

Instruction processing-

Break in instructions

PC value of TRAP

completed type

instruction + 4

EIT

4.5 Acceptance of EIT Events

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