YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 505

Manufacturer Part Number

YR0K42378FC000BA

KIT EVAL FOR H8S/2378

Manufacturer

Renesas Electronics America

For Use With/related Products

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Section 9 Data Transfer Controller (DTC)

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

information that is already stored in the on-chip RAM and transfers data on the basis of that

chip RAM. Pre-storage of register information in the on-chip RAM makes it possible to transfer

data over any required number of channels. There are three transfer modes: normal mode, repeat

mode, and block transfer mode. Setting the CHNE bit to 1 makes it possible to perform a number

of transfers with a single activation (chain transfer). A setting can also be made to have chain

transfer performed only when the transfer counter value is 0. This enables DTC re-setting to be

performed by the DTC itself.

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.

Figure 9.5 shows a flowchart of DTC operation, and table 9.3 summarizes the chain transfer

conditions (combinations for performing the second and third transfers are omitted).

Rev.7.00 Mar. 18, 2009 page 437 of 1136

REJ09B0109-0700