h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 221

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

7.4.9
Normal Transfer Mode (Cycle Steal Mode): Figure 7.15 shows an example of transfer when
TEND 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, word, or longword has been transferred, the bus is released. While the bus is
released, at least one CPU bus cycle is initiated.
Normal Transfer Mode (Burst Mode): Figure 7.16 shows an example of transfer when TEND
output is enabled, and word-size, normal transfer mode (burst mode) is performed from external
16-bit, 2-state access space to external 16-bit, 2-state access space.
φ
Address bus
Figure 7.15 Example of Normal Transfer Mode (Cycle Steal Mode) Transfer
DMAC Bus Cycles (Dual Address Mode)
Bus
release
DMA read DMA write
release
Bus
DMA read DMA write
release
Rev. 2.00, 03/04, page 189 of 534
Bus
DMA read DMA write
Last transfer
cycle
Bus
release