h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 228

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

7.4.10
Single Address Mode (Read): Figure 7.24 shows an example of transfer when TEND output is
enabled, and byte-size, single address mode transfer (read) is performed from external 8-bit, 2-
state access space to an external device.
Figure 7.25 shows an example of transfer when TEND output is enabled, and word-size, single
address mode transfer (read) is performed from external 8-bit, 2-state access space to an external
device.
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.
Rev. 2.00, 03/04, page 196 of 534
φ
Address bus
Bus release
φ
Address bus
DMAC Bus Cycles (Single Address Mode)
Figure 7.25 Example of Single Address Mode (Word Read) Transfer
Figure 7.24 Example of Single Address Mode (Byte Read) Transfer
Bus release
DMA read
DMA read
Bus release
Bus release
DMA read
Bus release
DMA read
DMA read
Bus release
Bus release
DMA read
Last transfer cycle
transfer
cycle
Last
DMA read
Bus release
Bus
release