Transfer Modes; Figure 7.7 Example Of Signal Timing In Normal Transfer Mode; Figure 7.8 Operations In Normal Transfer Mode - Renesas H8SX/1500 Series Hardware Manual

Section 7 DMA Controller (DMAC)
7.4.2

Transfer Modes

(1)
Normal Transfer Mode
In normal transfer mode, one data access size of data is transferred at a single transfer request. Up
to 4 Gbytes can be specified as a total transfer size by DTCR. DBSR is ignored in normal transfer
mode.
The TEND signal is output only in the last DMA transfer.
Figure 7.7 shows an example of the signal timing in normal transfer mode and figure 7.8 shows
the operation in normal transfer mode.
Auto request transfer in dual address mode:
Bus cycle
TEND
External request transfer in single address mode:
DREQ
Bus cycle
DACK

Figure 7.7 Example of Signal Timing in Normal Transfer Mode

Address T
A
Address B
A
Rev. 3.00 Mar. 14, 2006 Page 162 of 804
REJ09B0104-0300
DMA transfer
cycle
Read

Figure 7.8 Operations in Normal Transfer Mode

Last DMA
transfer cycle
Write Read Write
DMA
Transfer
Total transfer
size (DTCR)
DMA
Address T
B
Address B
B