HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 516

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Figure 11.36 When an 8-Bit External Device is Connected (Edge Detection)
Figure 11.35 When a16-Bit External Device is Connected (Edge Detection)
(Active high)
(Active high)
Bus cycle
DREQn
DACKn
Clock
(Active high)
(Active high)
Bus cycle
DREQn
DACKn
Clock
1st
acceptance
CPU
Blind zone
CPU
CPU
1st
acceptance
Blind zone
2nd
acceptance
DACK
HH
DMAC
HH
CPU
DACK
HL
2nd
acceptance
DACK
DMAC
HL
H
DMAC
H
DACK
LH
DMAC
DACK
LH
DMAC
L
L
DACK
LL
DMAC
LL
Blind zone
501