HD6432351 datasheet(337/1025 Pages) RENESAS

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Section 8 Data Transfer Controller (DTC)

Rev. 3.00 Sep 15, 2006 page 303 of 988

REJ09B0330-0300

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

• SCI TXI or RXI

• A/D converter ADI

• DMAC DEND

• Software

24 bits

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