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32581C
9.3
AC Characteristics
The tables in this section list the following AC characteris-
tics:
• Output delays
• Input setup requirements
• Input hold requirements
• Output float delays
• Power-up sequencing requirements
The default levels for measurement of the rising clock edge
reference voltage (V
), and other voltages are shown in
REF
Table 9-11. Input or output signals must cross these levels
during testing. Unless otherwise specified, all measure-
ment points in this section conform to these default levels.
V
CLK
V
V
OHD
Outputs
V
OLD
Inputs
Legend: A = Maximum Output or Float Delay Specification
B = Minimum Output or Float Delay Specification
C = Minimum Input Setup Specification
D = Minimum Input Hold Specification
362
IHD
A
ILD
B
Min
Valid Output
n
V
IHD
V
ILD
Figure 9-2. Drive level and Measurement Points
Table 9-11. Default Levels for Measurement of
Switching Parameters
Symbol
Parameter
V
Reference Voltage
REF
V
Input High Drive Voltage
IHD
V
Input Low Drive Voltage
ILD
V
Output High Drive Voltage
OHD
V
Output Low Drive Voltage
OLD
All AC tests are at V
= 3.14V to 3.46V (3.3V nominal),
IO
o
o
T
= 0
C to 85
C, C
= 50 pF, unless otherwise specified.
C
L
T
X
Max
Valid Output
n+1
C
D
Valid Input
AMD Geode™ SC3200 Processor Data Book
Electrical Specifications
Value (V)
1.5
2.0
0.8
2.4
0.4
V
REF
V
REF
V
REF
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