Z80181 Zilog., Z80181 Datasheet - Page 54

• Manufacturer Part Number: Z80181
• Description: SMART ACCESS CONTROLLER (SAC)
• Manufacturer: Zilog.

Zilog
AC CHARACTERISTICS (Continued)
Z180 MPU Timing
2-54
(At edge
(At level
/DREQi
/DREQi
/TENDi
sense)
sence)
ST
Ø
DMA Control Signals
[1] tDRQS and tDRQH are specified for the rising edge of clock followed by T3.
[2] tDRQS and tDRQH are specified for the rising edge of clock.
[3] DMA cycle starts.
[4] CPU cycle starts.
T1
CPU or DMA Read/Write Cycle (Only DMA Write Cycle for /TENDi)
17
[3]
Figure 63. DMA Control Signals
46
T2
44
45
44
[2]
Tw
45
[1]
T3
S
MART
47
A
CCESS
T1
C
18
DS971800500
ONTROLLER
[4]
Z80181
SAC
™