Rev. 1.0, 09/01, page 355 of 904
Address bus
Bus release
Bus release
Bus release
Last
transfer
cycle
DMA read
DMA read
DMA read
DMA read
Bus release
Bus release
ø
Figure 8.22 Example of Single Address Mode (Byte Read) Transfer
Figure 8.23 shows an example of transfer when
(7(1'
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.
DMA read
Address bus
Bus release
Bus release
Bus
release
Last transfer cycle
Bus release
DMA read
DMA read
ø
Figure 8.23 Example of Single Address Mode (Word Read) Transfer
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.
Single Address Mode (Write): Figure 8.24 shows an example of transfer when
(7(1'
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.
Содержание H8S/2376 F-ZTAT
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