AMD-762JLC AMD [Advanced Micro Devices], AMD-762JLC Datasheet - Page 74
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AMD-762JLC
Manufacturer Part Number
AMD-762JLC
Description
System Controller
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AMD-762JLC.pdf
(122 pages)
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AMD-762™ System Controller Data Sheet
4.5.3
Valid Delay, Float,
Setup, and Hold
Timings
Figure 20.
AGP Interface Timing
62
Data Out
Data In
CLK
Setup, Hold, and Valid Delay Timings
AGP/PCI Signals
t
vd
The valid delay and float timings for output signals during
functional operation are relative to the rising edge of the given
clock. The maximum valid delay timings are provided to allow
a system designer to determine if setup times can be met.
Likewise, the minimum valid delay timings are used to analyze
hold times.
The setup and hold time requirements for the AMD-762 system
controller input signals presented here must be met by any
device that interfaces with it to assure the proper operation of
the AMD-762 system controller.
Figure 20 shows the relationship between the rising clock edge
and setup, hold, and valid data timings.
The 4x AGP interface of the AMD-762 system controller can
operate in three modes — 1x, 2x, and 4x, and complies to the
AGP specification parameters.
The timings for the 1x mode, shown in Table 22 on page 63, are
relative to AGPCLK. The timings for the 2x mode, shown in
Table 23 on page 64, are relative to the respective strobe.
The timings for the 4x mode, shown in Table 24 on page 65,
apply only to the inner loop 4x clock mode signals (AD, C/BE#,
and SBA).
Figure 21 on page 65 shows an AGP 2x strobe/data turnaround
timing diagram. Figure 22 on page 66 and Figure 23 on page 66
show AGP 2x and 4x timing diagrams, respectively. Figure 24
on page 67 shows an AGP 4x strobe/data turnaround timing
diagram.
Preliminary Information
Electrical Data
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su
t
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t
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24416C—December 2001
Chapter 4
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