HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 474

• 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)
φ pin
Bus cycle
Current
channel
EDACK
Other
channel
transfer
request
(EDREQ)
Rev.7.00 Mar. 18, 2009 page 406 of 1136
REJ09B0109-0700
φ pin
Bus cycle
CPU
operation
EDACK
ETEND
single cycle
CPU cycle
EXDMA
External
space
Figure 8.29 Auto Request/Cycle Steal Mode/Normal Transfer Mode
Figure 8.30 Auto Request/Cycle Steal Mode/Normal Transfer Mode
1 cycle
Bus
release
(Contention with Another Channel/Single Address Mode)
EXDMA single
single cycle
transfer cycle
EXDMA
External space
(CPU Cycles/Single Address Mode)
Bus
release
single cycle
1 bus cycle
CPU cycle
EXDMA
1 cycle
Bus
release
EXDMA single
transfer cycle
Higher-priority channel EXDMA cycle
External space
CPU cycle
Last transfer cycle
EXDMA single
transfer cycle
1 cycle
Bus
release
External space
single cycle
EXDMA
CPU cycle
Bus
release