Z8S180 Zilog., Z8S180 Datasheet - Page 267
Z8S180
Manufacturer Part Number
Z8S180
Description
ENHANCED Z180 MICROPROCESSOR
Manufacturer
Zilog.
Datasheet
1.Z8S180.pdf
(326 pages)
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Bus Control Signal Conditions
BUS AND CONTROL SIGNAL CONDITION IN EACH MACHINE
CYCLE
Table 51. Bus and Control Signal Condition in Each Machine Cycle
Instruction
ADD HL,ww
ADD IX,xx
ADD IY,yy
ADC HL,ww
SBC HL,ww
Machine
Cycle
MC1
MC2
~MC5
MC1
MC2
MC3
~MC6
MC1
MC2
MC3
~MC6
* (ADDRESS) invalid
Z (DATA) high impedance.
** added new instructions to Z80
States
T1T2T3 1st Op Code
TiTiTiTi *
T1T2T3 1st Op Code
T1T2T3 2nd Op Code
TiTiTiTi *
T1T2T3 1st Op Code
T1T2T3 2nd Op Code
TiTiTiTi *
Address
Address
Address
Address
Address
Address
Data
1st Op
Code
Z
1st Op
Code
2nd Op
Code
Z
1st Op
Code
2nd Op
Code
Z
RD WR MREQ
0
1
0
0
1
0
0
1
1
1
1
1
1
1
1
1
0
1
0
0
1
0
0
1
MPU User Manual
IORQ M1 HALT ST
1
1
1
1
1
1
1
1
UM005001-ZMP0400
Z8018x Family
0
1
0
0
1
0
0
1
1
1
1
1
1
1
1
1
0
1
0
1
1
0
1
1
251
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