Fujitsu F2MC-16LX Hardware Manual page 73

Mb90470 series 16-bit microcontroller

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Table of Contents

❍ Suppressing hardware interrupts in the interrupt suppress instruction

Of the ten types of hardware interrupt suppress instruction listed in Table 3.4-2 "Hardware

interrupt suppress instruction", none can detect whether or not hardware interrupt requests are

present, and none can ignore an interrupt request. If a valid hardware interrupt request is

generated during execution of these instructions, the interrupt request is not executed until

execution of a subsequent instruction is completed. In this case, the subsequent instruction is

other than the instructions mentioned above.

Table 3.4-2 Hardware interrupt suppress instruction

Instruction that rejects

interrupt and hold

❍ A hardware interrupt is suppressed during execution of software interrupt

When a software interrupt starts, other interrupt requests are not accepted so that the I-flag is

cleared to "0".

Interrupt and hold suppress instruction

(instruction to delay the effect of prefix code)

CHAPTER 3 INTERRUPT

MOV ILM, #imm8

AND CCR, #imm8