H8SSLASH2214 datasheet(322/936 Pages) RENESAS

部件名	H8S/2214

功能描述	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	936 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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Section 8 Data Transfer Controller (DTC)

Rev.4.00 Sep. 18, 2008 Page 262 of 872

REJ09B0189-0400

8.3

Operation

8.3.1

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 8.2 shows a flowchart of DTC operation.

Start

Read DTC vector

Next transfer

Note: * See the section on the corresponding peripheral module for details

on the content of the processing required for interrupt handling.

Read register information

Data transfer

Write register information

Clear an activation flag

CHNE = 1

End

Yes

Transfer Counter = 0

or DISEL = 1

Clear DTCER

Interrupt exception

handling

Figure 8.2 Flowchart of DTC Operation

H8S/2214 数据表(PDF) 322 Page - Renesas Technology Corp