E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 315

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Full Address Mode (Cycle Steal Mode)
Figure 7.20 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 one-byte or one-word transfer is performed, and after the transfer the bus is released. While the
bus is released one bus cycle is inserted 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
Bus release
Figure 7.20 Example of Full Address Mode (Cycle Steal) Transfer
DMA
read
DMA
write
Bus release
DMA
read
DMA
write
Rev. 5.00 Sep 14, 2006 page 285 of 1060
Bus release
DMA
read
Last transfer
Section 7 DMA Controller
cycle
DMA
write
REJ09B0331-0500
DMA
dead
Bus
release