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STPC4HEBI Datasheet(PDF) 36 Page - STMicroelectronics

Part No. STPC4HEBI
Description  X86 Core PC Compatible Information Appliance System-on-Chip
Download  93 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STPC4HEBI Datasheet(HTML) 36 Page - STMicroelectronics

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ELECTRICAL SPECIFICATIONS
36/93
Release 1.5 - January 29, 2002
4.5. AC CHARACTERISTICS
This section lists the AC characteristics of the
STPC interfaces including output delays, input
setup requirements, input hold requirements and
output float delays. These measurements are
based on the measurement points identified in
Figure 4-1 and Figure 4-2. The rising clock edge
reference level VREF and other reference levels
are shown in Table 4-9 below. Input or output
signals must cross these levels during testing.
Figure 4-1 shows output delay (A and B) and input
setup and hold times (C and D). Input setup and
hold times (C and D) are specified minimums,
defining the smallest acceptable sampling window
a synchronous input signal must be stable for
correct operation.
Note: Refer to Figure 4-1.
Table 4-9. Drive Level and Measurement Points for Switching Characteristics
Symbol
Value
Units
VREF
1.5
V
VIHD
2.5
V
VILD
0.0
V
Figure 4-1. Drive Level and Measurement Points for Switching Characteristics
CLK:
VRef
VILD
VIHD
Tx
LEGEND:
A - Maximum Output Delay Specification
B - Minimum Output Delay Specification
C - Minimum Input Setup Specification
D - Minimum Input Hold Specification
VRef
Valid
Valid
Valid
OUTPUTS:
INPUTS:
Output n
Output n+1
Input
MAX
MIN
A
B
CD
VRef
VILD
VIHD


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