
MOTOROLA
MC68306 USER'S MANUAL
8- 9
8.8 AC ELECTRICAL SPECIFICATIONS—CHIP SELECTS AND
INTERRUPT ACKNOWLEDGE (The electrical specifications in this document are preliminary.)
16.67 MHz
Num
Characteristic
Min
Max
Unit
61
Address Valid to CS≈ Asserted (Read or Write)
15
—
ns
61A
FC Valid to CS≈ Asserted (Read or Write)
45
—
ns
62
AS V DS to CS≈
05
ns
63
AS V R/ W to CS≈
05
ns
64
CS≈ Width Asserted
120
—
ns
65
CS≈ Negated to FC, Addess Invalid
15
—
ns
66
CS≈ Negated to R/ W Invalid
15
—
ns
67
Data-Out Valid to CS≈ Negated (Write)
90
—
ns
68
CS≈ Negated to Data-Out Invalid (Write)
15
—
ns
69
CS≈ Negated to Data-In High Impedance
—
90
ns
70
CLKOUT High to IACK≈ Asserted
0
30
ns
70A
LDS High to IACK≈ Negated
0
10
ns
V = Boolean OR
S0
S1
S2
S3
S4
S5
S6
CLKOUT
FC2–FC0,
A23–A0
AS
R/W
DATA
(NOTE 1)
LDS / UDS
CS
S12
S13
S14
S15
S16
S17
S18
62
63
65
66
63
67
68
READ
WRITE
(NOTE 1)
9A
OE
UW, LW
NOTE: THE WRITE CYCLE ILLUSTRATED IS PART OF A TEST AND SET INSTRUCTION.
61
64
69
IN
OUT
64
IACKx
70
61A
70A
12A
61A
12A
Figure 8-5. Chip Select and Interrupt Acknowledge Timing Diagram
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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