z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 100

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

Table 10.
Machine
Cycle
1
2
3
4
5
6
7
8
9
10
IOC affects the IORQ/RD signals. M1E affects the assertion of M1. One state also reflects a 1 while
the other reflects a 0
States Address Data
T1-T3 1st
TI-T3 2nd
T1
T1
T1
T1-T3 1st
T1
T1-T3 2nd
T1-T3 SP
T1-T3 SP+1
RETI Control Signal States
Z8X180. Figure 43 illustrates the INT1, INT2 and internal interrupts
timing.
Op Code
Op Code
Don't
Care
Don't
Care
Don't
Care
Op Code
Don't
Care
Op Code
EDH
4DH
3-state
3-state
3-state
EDH
3-state
4DH
data
data
RD WR MREQ IORQ
0
0
1
1
1
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
1
1
1
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
Family MPU User Manual
MI
M1E=1 M1E=0 HALT ST
0
0
1
1
1
0
1
0
1
1
UM005003-0703
1
1
1
1
1
0
1
1
1
1
Z8018x
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
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