HD6432670 Hitachi, HD6432670 Datasheet - Page 416

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Figure 8.25 shows an example of transfer when
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.
mode transfer activated by the
Rev. 2.0, 04/02, page 370 of 906
ø
Address bus
Bus release
ø
Address bus
Pin Falling Edge Activation Timing: Figure 8.26 shows an example of single address
Figure 8.25 Example of Single Address Mode (Word Write) Transfer
Figure 8.24 Example of Single Address Mode (Byte Write) Transfer
Bus release
DMA write
DMA write
Bus release
Bus release
pin falling edge.
DMA write
Bus release
DMA write
DMA write
output is enabled, and word-size, single
Bus release
Bus release
DMA write
Last transfer cycle
transfer
cycle
Last
DMA write
Bus release
Bus
release