HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 461

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8.4.9
Normal Transfer Mode (Cycle Steal Mode): Figure 8.15 shows an example of transfer when
ETEND output is enabled, and word-size, normal transfer mode (cycle steal mode) is performed
from external 16-bit, 2-state access space to external 16-bit, 2-state access space.
After one byte or word has been transferred, the bus is released. While the bus is released, one
CPU, DMAC, or DTC bus cycle is initiated.
φ
Address bus
RD
HWR
LWR
ETEND
Figure 8.15 Example of Normal Transfer Mode (Cycle Steal Mode) Transfer
EXDMAC Bus Cycles (Dual Address Mode)
Bus
release
DMA read
DMA write
release
Bus
DMA read DMA write
Rev.7.00 Mar. 18, 2009 page 393 of 1136
Section 8 EXDMA Controller (EXDMAC)
release
Bus
DMA read DMA write
Last transfer
cycle
REJ09B0109-0700
Bus
release