z80180 ZiLOG Semiconductor, z80180 Datasheet - Page 40

• Manufacturer Part Number: z80180
• Description: Microprocessor Unit
• Manufacturer: ZiLOG Semiconductor

DMA Control Signals
Notes:
PS014004-1106
1. t
2. t
3. DMA cycle starts.
4. CPU cycle starts.
DRQS
DRQS
and t
and t
DREQi
(at level sense)
DREQi
(at level sense)
TENDi
ST
ø
DHQH
DHQH
are specified for the rising edge of clock.
are specified for the rising edge of clock followed by T
*3 17
T
1
CPU or DMA READ/WRITE Cycle (Only DMA WRITE Cycle for TENDi)
Figure 19. DMA Control Signals
47
45
46
*2
T
2
45
46 *1
T
W
T
3
3
.
48
*4
18
T
1
Microprocessor Unit
Architecture
Z80180
34