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H8/3021 Datasheet(PDF) 126 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 126 Page - Renesas Technology Corp

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5. Interrupt Controller
Rev.2.00 Mar. 22, 2007 Page 102 of 684
REJ09B0352-0200
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
External Memory
On-Chip
8-Bit Bus
No.
Item
Memory
2 States
3 States
1
Interrupt priority decision
2*
1
2*
1
2*
1
2
Maximum number of states
1 to 23
1 to 27
1 to 31*
4
until end of current instruction
3
Saving PC and CCR to stack
4
8
12*
4
4
Vector fetch
4
8
12*
4
5
Instruction prefetch*
2
4
8
12*
4
6
Internal processing*
3
4
4
4
Total
19 to 41
31 to 57
43 to 73
Notes: 1. 1 state for internal interrupts.
2. Prefetch after the interrupt is accepted and prefetch of the first instruction in the
interrupt service routine.
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.



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