Datasheet

Mobile Intel
®
Pentium
®
III Processor in BGA2 and Micro-PGA2 Packages at 1 GHz,
900 MHz, 850 MHz, 800 MHz, 750 MHz, 700 MHz, Low-voltage 750 MHz, Low-voltage
700 MHz, Low-voltage 600 MHz, Ultra Low-voltage 600 MHz and Ultra Low-voltage 500 MHz
283653-002 Datasheet 45
Figure 17. BCLK/PICCLK Generic Clock Waveform
V0012-01
V1
V2
V3
max
V4
V3
min
V5
4.2 GTL+ AC Signal Quality Specifications
Table 25, Figure 18, and Figure 19 illustrate the GTL+ signal quality specifications for the mobile
Pentium III processor. Refer to the Pentium
®
II Processor Developer’s Manual for the GTL+
buffer specification. The mobile Pentium III processor maximum overshoot and undershoot
specifications for a given duration of time are specified in Table 26. Contact your Intel Field Sales
representative for a copy of the OVERSHOOT_CHECKER tool. The OVERSHOOT_CHECKER
determines if a specific waveform meets the overshoot/undershoot specification. Figure 20 shows
the overshoot/undershoot waveform. The tolerances listed in Table 26 are conservative. Signals
that exceed these tolerances may still meet the processor overshoot/undershoot tolerance if the
OVERSHOOT_CHECKER tool says that they pass.
Table 25. GTL+ Signal Group Ringback Specification
Symbol Parameter Min Unit Figure Notes
α
Overshoot 100 mV Figure 18,
Figure 19
Notes 1, 2
τ
Minimum Time at High 0.5 ns Figure 18,
Figure 19
Notes 1, 2
ρ
Amplitude of Ringback -200 mV Figure 18,
Figure 19
Notes 1, 2, 3
φ
Final Settling Voltage 200 mV Figure 18,
Figure 19
Notes 1, 2
δ
Duration of Sequential Ringback N/A ns Figure 18,
Figure 19
Notes 1, 2
NOTES:
1. Specified for the edge rate of 0.3 – 0.8 V/ns. See Figure 18 for the generic waveform.
2. All values determined by design/characterization.