z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 36

• Manufacturer Part Number: z80189
• Description: Z80180, Z8s180, Z8l180 Mpu Operation
• Manufacturer: ZiLOG Semiconductor

A0
D0
MREQ
WAIT
–
–
A19
WR
Phi
RD
D7
Wait States (TW) are inserted as previously described for Op Code fetch
cycles. Figure 11 illustrates the read/write timing without Wait States
(Tw), while Figure 12 illustrates read/write timing with Wait States (TW).
Figure 11.
T1
Memory address
Read Cycle
T2
Memory Read/Write (without Wait State) Timing Diagram
Read data
T3
T1
Memory address
Write Cycle
Family MPU User Manual
T2
Write data
T3
UM005003-0703
Z8018x
T1
21