HD64F3670 RENESAS [Renesas Technology Corp], HD64F3670 Datasheet - Page 84

• Manufacturer Part Number: HD64F3670
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

When another interrupt request is accepted before an instruction to which an address break is set is
executed, exception handling of an address break interrupt is not executed. However, the ABIF bit
is set to 1 (see figure 4.4). Therefore the ABIF bit must be read during exception handling of an
address break interrupt.
Rev. 2.0, 03/02, page 60 of 298
Figure 4.4 Operation when Another Interrupt is Accepted at Address Break Setting
Adress bus
Adress break
interrupt request
ABIF
[Register setting]
External interrupt
ABRKCR=H'80
BAR=H'0144
instruction
External interrupt acceptance
prefetch
MOV
0142
instruction
prefetch
MOV
0144
*
[Program]
001C 0900
0142
0144
0146
:
instruction
prefetch
MOV
MOV.B #H'23,R1H
MOV.B #H'45,R1H
MOV.B #H'67,R1H
:
0146
processing
Instruction
Internal
SP-2
Stack save
Underlined indicates the addoress to be stacked.
SP-4
Vector
fetch
001C
processing
Internal
External interrupt
0900
acceptance