YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 415

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

Figure 7.33 shows an example of single address transfer using the write data buffer function. In

this example, the CPU program area is in on-chip memory.

When the write data buffer function is activated, the DMAC recognizes that the bus cycle

concerned has ended, and starts the next operation. Therefore, DREQ pin sampling is started one

state after the start of the DMA write cycle or single address transfer.

The DMAC channel priority order is: channel 0 > channel 1, and channel A > channel B. Table

7.11 summarizes the priority order for DMAC channels.

Table 7.11 DMAC Channel Priority Order

Short Address Mode

Figure 7.33 Example of Single Address Transfer Using Write Data Buffer Function

Internal read signal

External address

Internal address

Multi-Channel Operation

Full Address Mode

Rev.7.00 Mar. 18, 2009 page 347 of 1136

Section 7 DMA Controller (DMAC)

REJ09B0109-0700