Datasheet

Pentium
®
II Processor at 350 MHz, 400 MHz, and 450 MHz
Datasheet 39
Table 23 provides the AGTL+ signal quality specifications for Pentium II processors for use in
simulating signal quality at the processor core. Table 24 provides AGTL+ signal quality guidelines
for measuring and testing signal quality at the processor edge fingers. Figure 15 describes the
signal quality waveform for AGTL+ signals at the processor core and edge fingers. For more
information on the AGTL+ interface, see the Pentium
®
II Processor Developer's Manual (Order
Number 243502).
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all Pentium
®
II processor frequencies and cache sizes.
2. Specifications are for the edge rate of 0.3 - 0.8 V/ns. See Figure 15 for the generic waveform.
3. All values specified by design characterization.
4. This specification applies to Pentium II processors operating with a 100-MHz Pentium II processor system bus only.
5. Ringback below V
REF
+ 20 mV is not supported.
6. Intel recommends performing simulations using an amplitude of -120 mV to allow margin for other sources of system
noise.
NOTES:
1. Unless otherwise noted, all guidelines in this table apply to all Pentium
®
II processor frequencies and cache sizes.
2. Guidelines are for the edge rate of 0.3 - 0.8 V/ns. See Figure 15 for the generic waveform.
3. All values specified by design characterization.
4. This guideline applies to Pentium II processors operating with a 100-MHz Pentium II processor system bus only.
5. Ringback below V
REF
+ 210 mV is not supported.
Table 23. AGTL+ Signal Groups Ringback Tolerance Specifications at the Processor Core
1, 2, 3
T# Parameter Min Unit Fi
g
ure Notes
α
: Overshoot 100 mV 15 4
τ
: Minimum Time at High 0.50 ns 15 4
ρ
: Amplitude of Ringback –20 mV 15 4, 5, 6
φ
: Final Settling Voltage 20 mV 15 4
δ
: Duration of Squarewave Ringback N/A ns 15
Table 24. AGTL+ Signal Groups Ringback Tolerance Guidelines for Edge Finger Measurement
1, 2, 3
T# Parameter Min Unit Fi
g
ure Notes
α
’: Overshoot 100 mV 15
τ
’: Minimum Time at High 0.5 ns 15 4
ρ
’: Amplitude of Ringback –210 mV 15 4,5
φ
’: Final Settling Voltage 210 mV 15 4
δ
’: Duration of Squarewave Ringback N/A ns 15