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Chapter 8
Interrupt/Exception Processing Function
Preliminary User’s Manual U15839EE1V0UM00
8.9 Periods in Which Interrupts Are Not Acknowledged
An interrupt is acknowledged while an instruction is being executed. However, no interrupt will be
acknowledged between an interrupt non-sample instruction and the next instruction.
The interrupt request non-sampling instructions are as follows.
• EI instruction
• DI instruction
• LDSR reg2, 0x5 instruction (for PSW)
• The store instruction for the interrupt control register (PlCn), in-service priority register (ISPR),
and command register (PRCMD).
Table 8-3:
Interrupt Response Time
Interrupt Response Time (Internal System Clocks)
Condition
Internal Interrupt
External interrupt
Minimum
5
5 + analog delay time The following cases are exceptions:
•
In IDLE/software STOP mode
•
External bit access
•
Two or more interrupt request non-
sample instructions are executed
•
Access to interrupt control register
Maximum
11
11 + analog delay time
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