Dma Controller; Overview; Features - Hitachi H8/3048 Hardware Manual

Single-chip microcomputer

Table of Contents

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The H8/3048 Series has an on-chip DMA controller (DMAC) that can transfer data on up to four

When the DMA controller is not used, it can be independently halted to conserve power. For

details see section 20.6, Module Standby Function.

DMAC features are listed below.

Selection of short address mode or full address mode

Short address mode

— 8-bit source address and 24-bit destination address, or vice versa

— Maximum four channels available

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

Full address mode

— 24-bit source and destination addresses

— Maximum two channels available

— Selection of normal mode or block transfer mode

Directly addressable 16-Mbyte address space

Selection of byte or word transfer

Activation by internal interrupts, external requests, or auto-request (depending on transfer

— 16-bit integrated timer unit (ITU) compare match/input capture interrupts (four)

— Serial communication interface (SCI channel 0) transmit-data-empty/receive-data-full

— External requests

— Auto-request

Section 8 DMA Controller