Chapter 24 Interrupt Control; Overview; Features - Fujitsu MB91460 SERIES FR60 User Manual

Chapter 24 Interrupt Control

1. Overview

Interrupt control manages interrupt reception and arbitration.
Priority judging circuit
Interrupt requests
(peripheral function,
INT instruction, and
delayed interrupt)

2. Features

• Functions
• Detection of interrupt requests
• Priority determination (determined by level and number)
• Interrupt level propagation of the factor of the priority to the CPU
• Interrupt number propagation of the factor of the priority to the CPU
• Request (to the CPU) to return from stop mode by a valid interrupt (Wakeup)
• Interrupt level
• Reserved for System: level 0 to 14
• MNI
• Interrupt
• Interrupt disable
• Number of interrupt triggers
• NMI
• Interrupt from peripheral functions: 128
• Delayed interrupt
• Reserved for system (for REALOS): 2
• INT instruction
Wakeup
NMI
NMI processing
Interrupt
priority
judging circuit
: level 15
: level 16 to 31
: level 32
(As the interrupt level goes up, the number goes down.)
: 1
: 1
: 111
Interrupt level/
interrupt vector
generator
HLDREQ
cancel
request
Vector number
Chapter 24 Interrupt Control
Level
HALT
To the CPU
1.Overview
311