H8SXSLASH1663M datasheet(36/1504 Pages) RENESAS

36 / 1504 page

Section 1 Overview

Rev. 2.00 Sep. 24, 2008 Page 4 of 1468

REJ09B0412-0200

Classification

Module/

Function

Description

EXDMA

controller

(EXDMAC)

• Four-channel DMA transfer available

• Two activation methods (auto-request and external request)

• Four transfer modes (normal, repeat, block, and cluster

transfer)

• Dual or single address mode selectable

• Extended repeat area function

DMA

controller

(DMAC)

• Four-channel DMA transfer available

• Three activation methods (auto-request, on-chip module

interrupt, and external request)

• Three transfer modes (normal, repeat, and block)

• Dual or single address mode selectable

• Extended repeat area function

DMA

Data

transfer

controller

(DTC)

• Allows DMA transfer over 78 channels (number of DTC

activation sources)

• Activated by interrupt sources (chain transfer enabled)

• Three transfer modes (normal transfer, repeat transfer, block

transfer)

• Short-address mode or full-address mode selectable

• 16-Mbyte external address space

External bus

extension

Bus

controller

(BSC)

• The external address space can be divided into eight areas,

each of which is independently controllable

 Chip-select signals (CS0 to CS7) can be output

 Access in two or three states can be selected for each area

 Program wait cycles can be inserted

 The period of CS assertion can be extended

 Idle cycles can be inserted

• Bus arbitration function (arbitrates bus mastership among the

internal CPU, DMAC, EXDMAC, DTC, Refresh, and external

bus masters)

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