54
Datasheet
System Bus Signal Quality Specifications
NOTES:
1. Absolute Maximum Overshoot magnitude of 1.8V must never be exceeded.
2. Absolute Maximum Overshoot is measured referenced to VSS, Pulse Duration of overshoot is measured
relative to VCC.
3. Absolute Maximum Undershoot and Pulse Duration of undershoot is measured relative to VSS.
4. Ringback below VCC cannot be subtracted from overshoots/undershoots.
5. Lesser undershoot does not allocate longer or larger overshoot.
6. OEMs are strongly encouraged to follow Intel layout guidelines.
7. All values specified by design characterization.
8. Refer to
Table 5 for signal group definitions.
NOTES:
1. These specifications are measured at the processor pad.
2. Assumes a BCLK period of 10 ns.
3. AF is referenced to associated source synchronous strobes
NOTES:
1. These specifications are measured at the processor pad.
2. Assumes a BCLK period of 10 ns.
3. AF is referenced to associated source synchronous strobes.
.
Table 25. Intel Xeon Processor MP on the 0.13 Micron Process Processor Source
Synchronous AGTL+ Signal Group (Data) Overshoot/Undershoot Tolerance
Absolute
Maximum
Overshoot
(V)
Absolute
Maximum
Undershoot
(V)
Pulse Duration
(ns)
AF = 1
Pulse Duration
(ns)
AF = 0.1
Pulse Duration
(ns)
AF = 0.01
1.80
- 0.347
0.04
0.46
4.70
1.75
- 0.297
0.12
1.37
5.00
1.70
- 0.247
0.36
5.00
1.65
- 0.197
1.05
5.00
1.60
- 0.147
3.09
5.00
1.55
- 0.097
5.00
1.50
- 0.047
5.00
Table 26. Intel Xeon Processor MP on the 0.13 Micron Process Processor Common Clock
AGTL+ Signal Group Overshoot/Undershoot Tolerance
Absolute
Maximum
Overshoot
(V)
Absolute
Maximum
Undershoot
(V)
Pulse Duration
(ns)
AF = 1
Pulse Duration
(ns)
AF = 0.1
Pulse Duration
(ns)
AF = 0.01
1.80
- 0.347
0.08
0.86
8.67
1.75
- 0.297
0.25
2.53
10.00
1.70
- 0.247
0.73
7.34
10.00
1.65
- 0.197
2.11
10.00
1.60
- 0.147
6.19
10.00
1.55
- 0.097
10.00
1.50
- 0.047
10.00