h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 230

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

After one byte or word has been transferred in response to one transfer request, the bus is released.
While the bus is released, one or more CPU bus cycles are initiated.
Figure 7.29 shows an example of transfer when TEND output is enabled, and longword-size,
single address mode transfer (write) is performed from an external device to external 16-bit, 2-
state access space.
Rev. 2.00, 03/04, page 198 of 534
Address bus
φ
Address bus
Bus release
Figure 7.29 Example of Single Address Mode (Longword Write) Transfer
φ
Figure 7.28 Example of Single Address Mode (Word Write) Transfer
release
Bus
DMA write
DMA write
Bus release
release
Bus
DMA write
DMA write
Bus release
release
Bus
Last transfer cycle
Last transfer cycle
DMA write
DMA write
Bus
release
release
Bus