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Rev. 1.00, 05/04, page 86 of 544 
 
5.6.4 Interrupt 
Response Times 
Table 5.5 shows interrupt response times 
− the intervals between generation of an interrupt request 
and execution of the first instruction in the interrupt handling routine. The execution status 
symbols used in table 5.5 are explained in table 5.6. 
Table 5.5 
Interrupt Response Times 
No.  Execution Status 
Normal Mode 
Advanced Mode 
Interrupt priority determination*
1
 3 
Number of wait states until executing 
instruction ends*
2
 
1 to (19 + 2·S
I
PC, CCR stack save 
2·S
K
 2·S
K
 
4 Vector 
fetch 
S
I
 2·S
I
 
5 Instruction 
fetch*
3
 2·S
I
 
6 Internal 
processing*
4
 2 
Total (using on-chip memory) 
11 to 31 
12 to 32 
Notes:  1.  Two states in case of internal interrupt. 
 
2.  Refers to MULXS and DIVXS instructions.  
 
3.  Prefetch after interrupt acceptance and prefetch of interrupt handling routine.  
 
4.  Internal processing after interrupt acceptance and internal processing after vector fetch.  
 
Table 5.6 
Number of States in Interrupt Handling Routine Execution Status 
Object of Access 
Symbol 
Internal Memory 
Instruction fetch S
I
 
Branch address read S
J
 
Stack manipulation S
K