HD6432138SW datasheet(223/1061 Pages) RENESAS

Part #	HD6432138SW

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1061 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 7 Data Transfer Controller [H8S/2138 Group]

Rev. 4.00 Jun 06, 2006 page 169 of 1004

REJ09B0301-0400

7.3

Operation

7.3.1

Overview

When activated, the DTC reads register information that is already stored in memory and transfers

data on the basis of that register information. After the data transfer, it writes updated register

information back to memory. Pre-storage of register information in memory makes it possible to

transfer data over any required number of channels. Setting the CHNE bit to 1 makes it possible to

perform a number of transfers with a single activation.

Figure 7.2 shows a flowchart of DTC operation.

Start

Read DTC vector

Next transfer

Read register information

Data transfer

Write register information

Clear activation flag

CHNE = 1?

End

Yes

Transfer counter = 0

or DISEL = 1?

Clear DTCER

Interrupt exception

handling

Figure 7.2 Flowchart of DTC Operation

HD6432138SW Datasheet(PDF) 223 Page - Renesas Technology Corp