H8SSLASH2214 datasheet(323/936 Pages) RENESAS

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Section 8 Data Transfer Controller (DTC)

Rev.4.00 Sep. 18, 2008 Page 263 of 872

REJ09B0189-0400

The DTC transfer mode can be normal mode, repeat mode, or block transfer mode.

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.

Table 8.2 outlines the functions of the DTC.

Table 8.2

DTC Functions

Address Registers

Transfer Mode

Activation Source

Transfer

Source

Transfer

Destination

• Normal mode

⎯ One transfer request transfers one

byte or one word

⎯ Memory addresses are incremented

or decremented by 1 or 2

⎯ Up to 65,536 transfers possible

• Repeat mode

⎯ One transfer request transfers one

byte or one word

⎯ Memory addresses are incremented

or decremented by 1 or 2

⎯ After the specified number of

transfers (1 to 256), the initial state

resumes and operation continues

• Block transfer mode

⎯ One transfer request transfers a block

of the specified size

⎯ Block size is from 1 to 256 bytes or

words

⎯ Up to 65,536 transfers possible

⎯ A block area can be designated at

either the source or destination

• IRQ

• TPU TGI

• 8-bit timer CMI

• SCI TXI or RXI

• A/D converter ADI

• Software

24 bits

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