Front Side Bus Signal Quality Specifications
Table 3-6. GTL+ Asynchronous, PWRGOOD, TAP Signals Over/Undershoot Tolerance
Absolute Maximum
Overshoot (V)
Absolute Maximum
Undershoot (V)
Pulse Duration (ns)
AF = 1
Pulse Duration (ns)
AF = 0.1
1.55
1.50
1.45
1.40
1.35
1.30
-0.35
-0.30
-0.25
-0.20
-0.15
-0.10
0.4
1.3
4.7
12.8
30.0
30.0
30.0
30.0
3.4
9.3
25.0
30.0
NOTES:
1. These specifications are measured at the processor pad.
2. AF is referenced to a 33 MHz time domain.
Figure 3-5. Maximum Acceptable Overshoot/Undershoot Waveform
Time-dependent
Overshoot
VMAX
VTT
Maximum
Absolute
Overshoot
GTLREF
VOL
VSS
VMIN
Maximum
Absolute
Undershoot
§
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