HD643303x Hitachi, HD643303x Datasheet - Page 112

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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Interrupt
request
signal
A
Internal
read signal
Internal
write signal
On-chip
data
(1)
(2), (4)
(3)
(5)
(7)
Note: Mode 1, with program code and stack in on-chip memory area.
19
to A
0
Instruction prefetch address (not executed;
return address, same as PC contents)
Instruction code (not executed)
Instruction prefetch address (not executed)
SP – 2
SP – 4
Interrupt level
decision and wait
for end of instruction
Interrupt accepted
(2)
(1)
Instruction
prefetch
High
(4)
Internal
processing
(3)
(6), (8)
(9), (11)
(10), (12)
(13)
(14)
(6)
(5)
Stack
PC and CCR saved to stack
Vector address
Starting address of interrupt service routine (contents of
vector address)
Starting address of interrupt service routine; (13) = (10), (12)
First instruction of interrupt service routine
(8)
(7)
(10)
Vector fetch
(9)
(12)
(11)
Internal
processing
Prefetch of
interrupt
service routine
instruction
(14)
(13)