Intel ® Pentium ® Ii Processor And Inte ® L 440Gx Agpset; Recommended 100 Mhz System Timing Parameters; Recommended 100 Mhz System Flight Time Specs - Intel 440GX Design Manual

Motherboard Layout and Routing Guidelines
Notice that the timing equations include an extra term to account for the delay due to routing of the
BCLK trace on the processor substrate from the processor edge fingers and the processor core.
Adding the BCLK adjustment to the timing calculations between processor and chipset guarantees
host clock synchronization between the AGPset and processor core. The minimum and maximum
values for this term are contained in
Component timings for the Intel
in Table 2-10. The timing specifications are contained in the Intel
®
Intel 440GX AGPset Datasheets. These timing are for reference only.
®
Table 2-9. Intel Pentium
Specifications
Recommended values for system timings are contained in
clock generator device come from the CK97 clock driver specification. The PCB skew spec is
based on the results of extensive simulations at Intel. The T
with systems that use the Intel
Table 2-10. Recommended 100 MHz System Timing Parameters
The flight time requirements that result from using the component timing specifications and
recommended system timings are summarized in
verified against the current specifications before proceeding with analysis.
Table 2-11. Recommended 100 MHz System Flight Time Specs
®
Intel Pentium
AGPset
®
Intel Pentium
2-18
®
Pentium
®
II Processor and Intel
Timing Term Intel
T [ns]
co,max
T [ns]
co,min
T [ns]
su
T [ns]
h
T [ns]
clk,min
T [ns]
clk,max
®
Pentium
Timing Term
T [ns]
skew,CLK
T [ns]
skew,PCB
T [ns]
jit
T [ns]
adj
Driver Receiver
®
II processor AGPset
®
Intel Pentium
processor
®
Intel Pentium
®
II processor
processor
Table 2-9.
®
II processor and Intel
®
440GX AGPset 100 MHz Timing
®
Pentium II Processor
4.66
0.71
1.97
1.61
0.77
0.84
Table
adj
®
Pro processor and Intel
Value
0.18
0.15
0.25
0.40
Table 2-11. All component values should be
T
flight,min
0.36
®
II
0.37
®
II
1.23
®
440GX AGPset are contained
® ®
Pentium II processor and
®
Intel 440GX AGPset
4.45
0.80
3.00
-0.10
Not applicable
No applicable
2-10. Skew and jitter values for the
value is based on Intel's experience
® ®
Pentium II processor.
T
flight,max
2.13
1.76
2.39
®
Intel 440GX AGPset Design Guide