HD643303x Hitachi, HD643303x Datasheet - Page 113

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

5.4.3 Interrupt Response Time
Table 5-5 indicates the interrupt response time from the occurrence of an interrupt request until
the first instruction of the interrupt service routine is executed.
Table 5-5 Interrupt Response Time
No.
1
2
3
4
5
6
Total
Notes: 1. 1 state for internal interrupts.
2. Prefetch after the interrupt is accepted and prefetch of the first instruction in the interrupt
3. Internal processing after the interrupt is accepted and internal processing after prefetch.
4. The number of states increases if wait states are inserted in external memory access.
Item
Interrupt priority decision
Maximum number of states
until end of current instruction
Saving PC and CCR to stack
Vector fetch
Instruction prefetch
Internal processing
service routine.
*3
*2
98
On-Chip
Memory
2
1 to 23
4
4
4
4
19 to 41
*1
2 States
2
1 to 27
8
8
8
4
31 to 57
*1
External Memory
8-Bit Bus
3 States
2
1 to 31
12
12
12
4
43 to 73
*1
*4
*4
*4
*4