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6.10 AC ELECTRICAL SPECIFICATIONS - EXTERNAL MASTER
INTERNAL READ/WRITE CYCLES
(see Figures 6-6, 6-7, and 6-8)
16MHz
Num.
Characteristic
Symbol
Min
Max
110
Address Valid to AS Low
IAVASL
15
-
111
AS Low to Clock High
tASLCH
30
-
112
Clock Low to AS High
tcLASH
-
45
113
AS High to Address Hold Time
tASHAH
0
-
t14
AS Inactive Time
tRSH
1
-
115
UDS/LDS Low to Clock High
tSLCH
40
-
116
Clock Low to UDS/LDS High
tcLSH
-
45
117
R/W Valid to Clock High
IRWVCH
30
-
118
Clock High to R/W High
tcHRWH
-
45
119
AS Low to IAC High
t~L.!A_H
-
40
120
AS High to IAC Low
tASHI~
-
40
121
AS Low to DTACK Low (0 Wait State)
tASLDTL
-
45
122
Clock Low to DTACK Low (1 Wait State)
tcLDTL
-
30
123
AS High to DTACK High
tASHDTH
-
45
124
DTACK High to DTACK High Impedance
tDTHDTZ
-
15
125
Clock High to Data Out Valid
tGl,_DOV
-
30
126
AS High to Data High Impedance
IASHDZ
-
45
127
AS High to Data Out Hold Time
!8,.SHDOI
0
-
128
AS High to Address Hold Time
tASHAI
0
-
129
UDS/LDS Inactive Time
!S_H
1
-
130
Data In Valid to Clock Low
!g,J)IV
30
-
131
Clock Low to Data In Hold Time
tcLDIH
15
-
Unit
ns
ns
ns
ns
elk
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
elk
ns
ns
6-12
MC68302 USER'S MANUAL
MOTOROLA
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