ZiLOG Z8

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Ml M2 Ml
, _ _, Tl T2 T3 Tl r- T2 -r;- Tl T2 -T
3
CLOCK
PO X Aa-
A
15 X Aa-
A
15 x==
P1 X Ao A7 } ~ Ao-
A
7
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IN IN
AS '---1,---------,.'---1 '---f"
os 1_ \ r---~ /
R/W
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1
I· FETCH INSTRUCTION 'I' FETCH 1ST BYTE OF NEXT INSTRUCTION I I
Figure 6-11. Instruction Cycle Timing (One Byte Instructions)
Ml M2 Ml OR M3
,- =r -T
1
-1-----:r; T3 I - Tl T2 T3 ~ ,-- T2 r T3
CLOCK
PO
______ X· Aa-
A
15 X Aa-
A
15 X Aa-
A
15
P1 X Ao A7 ) s---< Ao-A7 ) ~ Ao-
A
7 ) ~
AS ~ . --- ~---- - --'---./
OS \ / \ / \ I
R/W /
FETCH 3RD BYTE (3·BYTE INSTR.)
I· FETCH 1ST BYTE ,I' FETCH 2ND BYTE I· FETCH 1ST BYTE (1 or 2 BYTE INSTR.)
figure 6-12. Instruction Cycle Tiaing (Two and Three Byte Instructions)
r'1
X
rT
ct>
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:::l
OJ
......
......
:::l
rT
(1)
...,
....,
OJ
o
(1)
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CD
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CD
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