E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 325

• 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

Figure 7.30 shows a transfer example in which TEND output is enabled and word-size single
address mode transfer (write) is performed from an external device to external 8-bit, 2-state access
space.
A one-byte or one-word transfer is performed for one transfer request, and after the transfer the
bus is released. While the bus is released one or more bus cycles are 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
DACK
TEND
HWR
LWR
Figure 7.30 Example of Single Address Mode (Word Write) Transfer
release
Bus
DMA write
release
Bus
DMA write
Rev. 5.00 Sep 14, 2006 page 295 of 1060
release
Bus
Section 7 DMA Controller
Last transfer
DMA write
cycle
REJ09B0331-0500
DMA
dead
release
Bus