HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 159

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

5.1
The interrupt controller (INTC) ascertains the priority order of interrupt sources and controls
interrupt requests to the CPU. The INTC has registers for setting the priority of each interrupt
which allow the user to set the order of priority in which interrupt requests are handled.
5.1.1
The INTC has the following features:
5.1.2
Figure 5.1 shows a block diagram of the INTC.
Sixteen interrupt priority levels can be set
By setting the five interrupt priority registers, the priorities of on-chip peripheral module
interrupts can be selected at 16 levels for different request sources.
Vector numbers for on-chip peripheral module interrupt can be set
By setting the 22 vector number setting registers, the vector numbers of on-chip peripheral
module interrupts can be set to values from 0 to 127 for different request sources.
The IRL interrupt vector number setting method can be selected: Either of two modes can be
selected by a register setting: auto-vector mode in which vector numbers are determined
internally, and external vector mode in which vector numbers are set externally.
IRQ interrupt settings can be made (low level, rising-, falling-, or both-edge detection)
Overview
Features
Block Diagram
Section 5 Interrupt Controller (INTC)
141