Hitachi H8/3664 Hardware Manual page 90

When the interrupt acceptance is prohibited after the RTE (RTB) instruction
Register setting
• ABRKCR = H'10
Interrupt
Interrupt
RTE
instruc-
tion
prefetch
φ
Address
039C
bus
Interrupt
request
MOV
instruc-
tion
execution
φ
Address
025A
bus
Interrupt
request
Interrupt acceptance
Figure 4.4 Address Break Interrupt Operation Example (3)
74
Program
0258 NOP
025A NOP
025C MOV.W @H'025A,R0
0260 NOP
0262 NOP
: :
NOP
instruc-
tion Stack
prefetch resumption
039E SP
NOP
instruc-
tion Internal
prefetch processing
0262
:
039A
039C
039E
:
MOV
instruc-
Internal tion 1
processing prefetch
SP+2 025C
Vector
Stack restore fetch
SP-2 SP-4 XXXX
Underline indicates the
address to be stacked.
:
NOP
RTE
NOP
:
MOV NOP
instruc- instruc-
tion 2 tion
prefetch prefetch
025E 0260
Interrupt request
is prohibited
Internal
processing
Continues
to the
lower