Hitachi H8/3664 Hardware Manual page 89

Figures 4.2 to 4.4 show the operation examples of the address break interrupt setting.
When the address break is specified in instruction execution cycle
Register setting
• ABRKCR = H'80
• BAR = H'025A
φ
Address
bus
Interrupt
request
Figure 4.2 Address Break Interrupt Operation Example (1)
When the address break is specified in the data read cycle
Register setting
• ABRKCR = H'A0
• BAR = H'025A
instruc-
prefetch
φ
Address
bus
Interrupt
request
Figure 4.3 Address Break Interrupt Operation Example (2)
Program
0258 NOP
025A NOP
*
025C MOV.W @H'025A,R0
0260 NOP
0262 NOP
:
NOP NOP MOV
instruc- instruc- instruc-
tion tion tion 1
prefetch prefetch prefetch
0258 025A
Interrupt acceptance
Program
0258 NOP
025A NOP
* 025C MOV.W @H'025A,R0
0260 NOP
0262 NOP
:
MOV MOV NOP
instruc- instruc-
tion 1 tion 2 tion
prefetch prefetch
025C 025E 0260
:
MOV
instruc-
tion 2 Internal
prefetch processing
025C 025E
Underline indicates the address
to be stacked.
:
MOV NOP
instruc- instruc-
tion tion
execution prefetch
025A 0262
Interrupt acceptance
Underline indicates the address
to be stacked.
Stack save
SP-2 SP-4
Next
instru-
ction Internal
prefetch processing
0264
Stack
save
SP-2
73