H8S2245 datasheet(159/818 Pages) RENESAS

부품명	H8S2245

상세설명	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

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Section 5 Interrupt Controller

Rev.3.00 Mar. 26, 2007 Page 117 of 772

REJ09B0355-0300

Figure 5.4 shows a block diagram of the priority decision circuit.

ICR

Default priority

determination

Vector

number

Interrupt acceptance

control and

3-level mask control

Interrupt

source

Interrupt control modes

0 and 1

Figure 5.4 Block Diagram of Interrupt Control Operation

(1) Interrupt Acceptance Control and 3-Level Control

Interrupt acceptance control and 3-level mask control is performed by means of the I and UI bits

in CCR, and ICR (control level).

Table 5.6 shows the interrupts selected in each interrupt control mode.

Table 5.6

Interrupts Selected in Each Interrupt Control Mode

Interrupt Mask Bits

Interrupt Control Mode

Selected Interrupts

All interrupts (control level 1 has priority)

NMI interrupts

All interrupts (control level 1 has priority)

NMI and control level 1 interrupts

NMI interrupts

Legend:

*: Don't care

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