Manualshelf

Datasheet

ManualsBrandsRENESAS ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller LQFP 144 (20x20) 16-Bit 34 MHz I/O number 96
481482483484485486487488489490
Section 8 EXDMA Controller (EXDMAC)
Rev.7.00 Mar. 18, 2009 page 415 of 1136
REJ09B0109-0700
φ pin
EDREQ
EDRAK
Bus cycle
CPU
operation
ETEND
1-block-size transfer period
1 bus cycle
CPU
cycle
CPU
cycle
CPU
cycle
CPU
cycle
CPU
cycle
CPU
cycle
CPU
cycle
CPU
cycle
External
space
External
space
External
space
External
space
EXDMA
read
EXDMA
write
EXDMA
read
EXDMA
read
EXDMA
write
EXDMA
read
EXDMA
write
1 bus cycle
1 bus cycle
Last transfer
in block
External
space
External
space
External
space
External
space
Repeated
Figure 8.42 External Request/Cycle Steal Mode/Block Transfer Mode
(CPU Cycles/Dual Address Mode/Low Level Sensing/BGUP = 1)