HD64F2357F20V Datasheet, PDF (257/1049 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-chip Microcomputer H8S Family / H8S/2300 Series

Single Address Mode (Write): Figure 7-29 shows a transfer example in which TEND output is enabled and byte-size
single address mode transfer (write) is performed from an external device to external 8-bit, 2-state access space.
ø
Address bus
HWR
LWR
DACK
TEND
DMA write
DMA write
DMA write
DMA
DMA write dead
Bus
release
Bus
release
Bus
release
Bus Last transfer Bus
release cycle
release
Figure 7-29 Example of Single Address Mode (Byte Write) Transfer
Figure 7-30 shows a transfer example in which TEND 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.
ø
Address bus
HWR
LWR
DACK
TEND
DMA write
DMA write
DMA write
DMA
dead
Bus
release
Bus
release
Bus
release
Last transfer
cycle
Bus
release
Figure 7-30 Example of Single Address Mode (Word Write) Transfer
A one-byte or one-word transfer is performed for one transfer request, and after the transfer the bus is released. While the
bus is released one or more bus cycles are inserted by the CPU or DTC.
Rev.6.00 Oct.28.2004 page 227 of 1016
REJ09B0138-0600H