YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 401

• Manufacturer Part Number: YR0K42378FC000BA
• Description: KIT EVAL FOR H8S/2378
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of YR0K42378FC000BA

• Contents: Board
• For Use With/related Products: H8S/2378
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Full Address Mode (Cycle Steal Mode): Figure 7.19 shows a transfer example in which TEND
output is enabled and word-size full address mode transfer (cycle steal mode) is performed from
external 16-bit, 2-state access space to external 16-bit, 2-state access space.
A byte or word transfer is performed for a single transfer request, and after the transfer, the bus is
released. While the bus is released, one bus cycle is executed by the CPU or DTC.
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.
Address bus
TEND
HWR
LWR
RD
φ
Bus release
Figure 7.19 Example of Full Address Mode Transfer (Cycle Steal)
DMA
read
DMA
write
Bus release
DMA
read
DMA
write
Rev.7.00 Mar. 18, 2009 page 333 of 1136
Bus release
Section 7 DMA Controller (DMAC)
DMA
read
Last transfer
cycle
DMA
write
REJ09B0109-0700
DMA
dead
Bus
release