H8SLASH3003 datasheet(20/715 Pages) RENESAS

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Table 1-1 Features (cont)

Feature

Description

Memory

RAM: 512 bytes

Interrupt

• Nine external interrupt pins: NMI, IRQ0 to IRQ7

controller

• 34 internal interrupts

• Three selectable interrupt priority levels

Bus controller

• Address space can be partitioned into eight areas, with independent bus

specifications in each area

• Chip select output available for each area

• 8-bit access or 16-bit access selectable for each area

• Two-state or three-state access selectable for each area

• Selection of four wait modes

• Bus arbitration function

DRAM refresh

• Directly connectable to 16-bit-wide DRAM

• CAS-before-RAS refresh

• Self-refresh mode selectable

Pseudo-static RAM refresh

• Self-refresh mode selectable

Usable as an interval timer

Short address mode

• Maximum eight channels available

• Selection of I/O mode, idle mode, or repeat mode

• Can be activated by compare match/input capture A interrupts from ITU

channels 0 to 3, SCI transmit-data-empty and receive-data-full interrupts, or

external requests

Full address mode

• Maximum four channels available

• Selection of normal mode or block transfer mode

• Can be activated by compare match/input capture A interrupts from ITU

channels 0 to 3, external requests, or auto-request

Refresh

controller

DMA controller

(DMAC)

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