r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 465

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Figure 8.25 shows an example of transfer when ETEND output is enabled, and word-size, single
address mode transfer (write) is performed from an external device to external 8-bit, 2-state access
space.
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, DMAC, or DTC bus cycles are initiated.
φ
Address bus
HWR
LWR
EDACK
ETEND
Bus release
Figure 8.25 Example of Single Address Mode (Word Write) Transfer
DMA write
Bus release
DMA write
Bus release
Rev. 1.00 Sep. 19, 2008 Page 437 of 1270
Section 8 EXDMA Controller (EXDMAC)
Last transfer cycle
DMA write
REJ09B0466-0100
Bus
release