MC68306 Motorola, MC68306 Datasheet - Page 169

• Manufacturer Part Number: MC68306
• Description: Integrated EC000 Processor
• Manufacturer: Motorola

8.7 AC ELECTRICAL SPECIFICATIONS—READ AND WRITE
CYCLES
MOTOROLA
Num
11A
14A
12A
11
12
13
14
15
17
18
20
6A
9A
9
16
6
7
8
1
2
1
2
2
2
2
1
1
2
2
CLKOUT Low to Address Valid (Row Address for DRAM Cycle)
CLKOUT High to FC Valid
CLKOUT High to Data Bus High Impedance (Maximum)
CLKOUT High to Address, FC Invalid (Minimum)
CLKOUT High to AS, LDS, UDS Asserted
UDS, LDS Asserted to OE, UW, LW Asserted
Address Valid to AS, LDS, UDS Asserted (Read)/ AS Asserted
(Write)
FC Valid to AS, LDS, UDS Asserted (Read)/ AS, Asserted
(Write)
CLKOUT Low to AS, LDS, UDS Negated
UDS, LDS Negated to OE, UW, LW Negated
AS, LDS, UDS Negated to Address, FC Invalid
AS (and LDS, UDS Read) Width Asserted
LDS, UDS, Width Asserted (Write)
AS, LDS, UDS Width Negated
CLKOUT High to Control Bus High Impedance
AS, LDS, UDS Negated to R/W Invalid
CLKOUT High to R/W High (Read)
CLKOUT High to R/W Low (Write)
CLKOUT
EXTAL
(The electrical specifications in this document are preliminary; see Figures 8-3 and 8-4)
NOTE:
0.8 V
4
1A
1.5 V
3.8 V
Timing measurements are referenced to and from a low voltage of 0.8 V and a high
voltage of 3.8 V, unless otherwise noted. The voltage swing through this range
should start outside and pass through the range such that the rise or fall will be linear
between 0.8 V and 3.8 V.
Characteristic
Figure 8-2. Clock Output Timing
1.5 V
MC68306 USER'S MANUAL
5
1.5 V
2
2A
1
Min
120
16.67 MHz
15
45
15
50
60
15
—
—
—
—
1
3
0
3
0
0
0
0
1.5 V
Max
3
30
30
50
30
15
30
15
50
30
30
—
—
—
—
—
—
—
—
3A
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3.8 V
1.5 V
0.8 V
1.5 V
1A
8- 5