236
Chapter 8
Interrupt/Exception Processing Function
Preliminary User’s Manual U15839EE1V0UM00
8.8 Interrupt Response Time
The following table describes the V850E/CA2 interrupt response time (from interrupt generation to start
of interrupt processing).
Except in the following cases, the interrupt response time is a minimum of 5 clocks. To input interrupt
requests continuously, leave a space of at least 5 clocks between interrupt request inputs.
•
During software or hardware STOP mode
•
When an external bus is accessed
•
When there are two or more successive interrupt request non-sampling instructions (see 8.9
“Periods in Which Interrupts Are Not Acknowledged” on page 237).
•
When the interrupt control register is accessed
Figure 8-28:
Pipeline Operation at Interrupt Request Acknowledgment (Outline)
Remark:
INT1 to INT4: Interrupt acknowledgement processing
IFx:
Invalid instruction fetch
IDx:
Invalid instruction decode
IF
ID
EX
VBCLK (Input)
Instruction 1
Instruction 2
Interrupt acknowledgement operation
Instruction (first instruction of
interrupt service routine)
Interrupt request
IF
ID
EX MEM WB
IFX
IDX
INT1 INT2 INT3 INT4
5 system clocks
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