Data Transfer Controller (Dtc); Overview; Features - Hitachi H8S/2646 Hardware Manual

Hitachi 16-bit single-chip microcomputer h8s/2646 series

Table of Contents

Section 8 Data Transfer Controller (DTC)

The H8S/2646 Series includes a data transfer controller (DTC). The DTC can be activated by an

interrupt or software, to transfer data.

• Transfer possible over any number of channels

 Transfer information is stored in memory

 One activation source can trigger a number of data transfers (chain transfer)

• Wide range of transfer modes

 Normal, repeat, and block transfer modes available

 Incrementing, decrementing, and fixing of source and destination addresses can be selected

• Direct specification of 16-Mbyte address space possible

 24-bit transfer source and destination addresses can be specified

• Transfer can be set in byte or word units

• A CPU interrupt can be requested for the interrupt that activated the DTC

 An interrupt request can be issued to the CPU after one data transfer ends

 An interrupt request can be issued to the CPU after the specified data transfers have

completely ended

• Activation by software is possible

• Module stop mode can be set

 The initial setting enables DTC registers to be accessed. DTC operation is halted by setting

module stop mode.