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CHAPTER 3 INTERRUPTS
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1. The software interrupt instruction is executed.
2. Special CPU registers in the register file are saved according to the microcode corresponding to the
software interrupt instruction.
3. The interrupt processing is completed with the RETI instruction in the user interrupt processing routine.
■ Others
When the program counter bank register (PCB) is "FF
table of the INT #vct8 instruction. When designing software, ensure that the CALLV instruction does not
use the same address as that of the #vct8 instruction.
Table D-2 shows the interrupt causes, interrupt vectors, and interrupt control registers.
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Figure 3.6-1 Occurrence and Release of Software Interrupt
Register file
➁
Microcode
IR
M C - 1 6 LX . C P U
2
F
RAM
➀
PS
I
S
B unit
Fetch
Queue
Instruction bus
", the CALLV instruction vector area overlaps the
H
PS
:Processor status
I
:Interrupt enable flag
S
:Stack flag
IR
:Instruction register
B unit :Bus interface unit
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