Interrupt - Fujitsu MB90460 Series Hardware Manual

CHAPTER 7 INTERRUPT
7.1

Interrupt

This chapter explains the interrupt and extended intelligent I/O service (EI
MB90460/465 series.
• Hardware interrupt
• Software interrupt
• Interrupt from extended intelligent I/O service (EI
• Exception processing
■ Interrupt Types and Functions
●
Hardware interrupt
A hardware interrupt transfers control to a user-defined interrupt processing program in response to an
interrupt request from a peripheral function.
●
Software interrupt
A software interrupt transfers control to a user-defined interrupt processing program triggered by the
execution of a dedicated software interrupt instruction (such as the INT instruction).
●
Interrupt from extended intelligent I/O service (EI
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The EI OS function automatically transfers data between a peripheral function and memory. Data transfer,
which has ordinarily been executed by an interrupt processing program, can be handled like a direct
memory access (DMA). When the specified number of data transfers has been terminated, the interrupt
processing program is automatically executed.
An instruction from EI
●
Exception processingException processing is basically the same as an interrupt. When an exception
event (execution of an undefined instruction) is detected on the instruction boundary, ordinary
processing is interrupted and exception processing is performed. This is equivalent to software
interrupt instruction INT10.
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OS is a type of hardware interrupt.
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OS) in the