Example Of Eit Processing - Renesas M32R/ECU Series User Manual

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4.12 Example of EIT Processing

(1) When RIE, AE, FPE, SBI, EI or TRAP occurs singly
RIE, AE, FPE, SBI, EI or TRAP
Figure 4.12.1 Processing of Events When RIE, AE, FPE, SBI, EI or TRAP Occurs Singly
(2) When RIE, AE, FPE or TRAP and EI occur simultaneously
RIE, AE, FPE or TRAP and EI
occur simultaneously
Figure 4.12.2 Processing of Events When RIE, AE, FPE or TRAP and EI Occur Simultaneously
IE = 1
occurs singly
Return address A:
IE = 1
Return address A:
4.12 Example of EIT Processing
BPC register = Return address A
IE = 0
If IE = 0, no events but reset and
SBI are accepted.
IE = 1
RTE instruction
RIE, AE, FPE or TRAP is accepted first.
BPC register = Return address A
IE = 0
RTE instruction
IE = 1
IE = 0
EI is accepted next.
BPC register = Return address A
IE = 1
RTE instruction
4-20
: EIT handler
: EIT handler
32180 Group User's Manual (Rev.1.0)
EIT