HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 367

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 10.14 Example of DREQ Input Detection in Cycle Steal Mode Level Detection
Figure 10.13 Example of DREQ Input Detection in Cycle Steal Mode Edge Detection
Figure 10.15 Example of DREQ Input Detection in Burst Mode Edge Detection
CKIO
Bus cycle
DREQ
(Overrun 0 at
DACK
(Active-high)
CKIO
Bus cycle
DREQ
(Overrun 1 at
high level)
DACK
(Active-high)
CKIO
Bus cycle
DREQ
(Rising)
DACK
(Active-high)
high level)
CKIO
DREQ
DACK
Bus cycle
Burst acceptance
1st acceptance
1st acceptance
1st acceptance
CPU
CPU
CPU
Non sensitive period
CPU
Non sensitive period
Non sensitive period
CPU
Non sensitive period
CPU
CPU
CPU
2nd acceptance
DMAC
DMAC
Acceptance
start
DMAC
DMAC
Acceptance start
2nd acceptance
Rev. 1.00, 02/04, page 329 of 804
2nd acceptance
Acceptance
start
CPU
CPU
CPU
DMAC