HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 476

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 EXDMA Controller (EXDMAC)
Rev.7.00 Mar. 18, 2009 page 408 of 1136
REJ09B0109-0700
φ pin
Bus cycle
CPU
operation
EDACK
ETEND
φ pin
Bus cycle
Original
channel
EDACK
Original
channel
ETEND
Other
channel
transfer
request
(EDREQ)
CPU cycle CPU cycle
External
space
Bus release
Figure 8.33 Auto Request/Burst Mode/Normal Transfer Mode
Figure 8.34 Auto Request/Burst Mode/Normal Transfer Mode
(Contention with Another Channel/Single Address Mode)
External
space
EXDMA single
transfer cycle
(CPU Cycles/Single Address Mode/BGUP = 1)
single cycle
External
EXDMA
space
single cycle
EXDMA single
EXDMA
transfer cycle
1 bus cycle
CPU cycle
EXDMA single
Last transfer
transfer cycle
cycle
single cycle
External
EXDMA
space
1 cycle
Bus
release
single cycle
EXDMA
Other channel EXDMA cycle
CPU cycle
Last transfer cycle
single cycle
EXDMA
CPU cycle
External
release
space
Bus