YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 479

• 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

External Request/Cycle Steal Mode/Block Transfer Mode: In block transfer mode, transfer of
one block is performed continuously in the same way as in burst mode. The timing of the start of
the next block transfer is the same as in normal transfer mode.
If a transfer request is generated for another channel, an EXDMA cycle for the other channel is
generated before the next block transfer.
The EDREQ pin sensing timing is different for low level sensing and falling edge sensing. The
same applies to transfer request acceptance and transfer start timing.
Figures 8.39 to 8.44 show operation timing examples for various conditions.
φ pin
Original
channel
EDREQ
Original
channel
EDRAK
Bus cycle
Other
channel
EDREQ
Other
channel
EDRAK
Figure 8.38 External Request/Cycle Steal Mode/Normal Transfer Mode Contention
EXDMA transfer
cycle
with Another Channel/Dual Address Mode/Low Level Sensing
Bus release
3 cycles
EXDMA
read
EXDMA
write
1 cycle
Bus
release
Rev.7.00 Mar. 18, 2009 page 411 of 1136
Section 8 EXDMA Controller (EXDMAC)
Other channel
transfer cycle
1 cycle
Bus
release
REJ09B0109-0700
EXDMA
read
EXDMA
write