HD64F2145 datasheet(184/829 Pages) RENESAS

tên linh kiện	HD64F2145

Giải thích chi tiết về linh kiện	Hitachi 16-Bit Single-Chip Microcomputer

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nhà sản xuất	RENESAS [Renesas Technology Corp]

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Rev. 2.0, 08/02, page 144 of 788

7.5

Operation

The DTC stores register information in on-chip RAM. When activated, the DTC reads register

information in on-chip RAM and transfers data. After the data transfer, the DTC writes updated

makes it possible to transfer data over any required number of channels. The transfer mode can be

specified as normal, repeat, or block transfer mode. Setting the CHNE bit in MRB to 1 makes it

possible to perform a number of transfers with a single activation source (chain transfer).

The 24-bit SAR designates the DTC transfer source address, and the 24-bit DAR designates the

transfer destination address. After each transfer, SAR and DAR are independently incremented,

decremented, or left fixed depending on its register information.

Start

End

Read DTC vector

Read register information

Data transfer

Write register information

Clear an activation flag

Interrupt exception

handling

Clear DTCER

CHNE = 1

Next transfer

Yes

Transfer counter = 0

or DISEL = 1

Figure 7.4 DTC Operation Flowchart

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