HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 120

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

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. Item
1
2
3
4
5
6
Total
Notes: 1. 1 state for internal interrupts.
Interrupt priority
decision
Maximum number
of states until end of
current instruction
Saving PC and CCR
to stack
Vector fetch
Instruction prefetch
Internal processing
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.
service routine.
*3
*2
On-Chip
Memory
2
1 to 23
4
4
4
4
19 to 41
*1
2 States
2
8
8
8
4
31 to 57
1 to 27
*1
106
8-Bit Bus
3 States
2
1 to 31
12
12
12
4
43 to 73
*1
*4
*4
*4
External Memory
*4
2 States
2
1 to 23
4
4
4
4
19 to 41
*1
16-Bit Bus
3 States
2
1 to 25
6
6
6
4
25 to 49
*1
*4
*4
*4
*4