Z8S180 Zilog., Z8S180 Datasheet - Page 289

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

Table 51. Bus and Control Signal Condition in Each Machine Cycle (Continued)
Instruction
PUSH IX
PUSH IY
RET
RET f
(If condition
is false)
RET f
(If condition
is true)
RETI (R0, R1)
RETN
Machine
Cycle
MC1
MC2
MC3~M
C4
MC5
MC6
MC1
MC2
MC3
MC1
MC2~M
C3
MC1
MC2
MC3
MC4
MC1
MC2
MC3
MC4
States
T1T2T3 1st Op Code
T1T2T3 2nd Op Code
TiTi
T1T2T3 SP-1
T1T2T3 SP-2
T1T2T3 1st Op Code
T1T2T3 SP
T1T2T3 SP+1
T1T2T3 1st Op Code
TiTi
T1T2T3 1st Op Code
Ti
T1T2T3 SP
T1T2T3 SP+1
T1T2T3 1st Op Code
T1T2T3 2nd Op Code
T1T2T3 SP
T1T2T3 SP+1
Address
Address
Address
*
Address
Address
*
Address
*
Address
Address
Data
1st Op
Code
2nd Op
Code
Z
IXH
IYH
IXL
IYL
1st Op
Code
DATA
DATA
1st Op
Code
Z
1st Op
Code
Z
DATA
DATA
1st Op
Code
2nd Op
Code
DATA
DATA
RD WR MREQ
0
0
1
1
1
0
0
0
0
1
0
1
0
0
0
0
0
0
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
MPU User Manual
IORQ M1 HALT ST
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
UM005001-ZMP0400
Z8018x Family
0
0
1
1
1
0
1
1
0
1
0
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
1
1
1
1
0
1
1
0
1
0
1
1
1
0
1
1
1
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