HD6432670 Hitachi, HD6432670 Datasheet - Page 361

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

In the transfer end cycle (the cycle in which the transfer counter reaches 0), a one-state DMA dead
cycle is inserted after the DMA write cycle.
Single Address Mode (Write): Figure 7.28 shows a transfer example in which
enabled and byte-size single address mode transfer (write) is performed from an external device to
external 8-bit, 2-state access space.
Figure 7.29 shows a transfer example in which
address mode transfer (write) is performed from an external device to external 8-bit, 2-state access
space.
Address bus
Figure 7.28 Example of Single Address Mode Transfer (Byte Write)
ø
release
Bus
DMA write
release
Bus
DMA write
release
Bus
output is enabled and word-size single
DMA write
release
Bus
Rev. 2.0, 04/02, page 315 of 906
DMA write
Last transfer
cycle
DMA
dead
release
Bus
output is