EP80579 Datasheet, PDF (1904/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Figure 49-48.CRU Differential Clock Cross-Point Specification
650
600
550
500
550 + 0.5 (VHavg – 710)
450
550 mV
400
250 + 0.5 (VHavg – 710)
350
300
250 mV
250
200
660 670 680 690 700 710 720 730 740 750 760 770 780 790 800 810 820 830 840 850
VHavg (mV)
B6569-01
49.5.20.3 CRU AC Specifications
Table 49-103.CRU Differential Input Clock Timing Specifications (Sheet 1 of 2)
Symbol
Parameter
Min
Nom
Max
Unit
Figures
Notes
CLKN100/CLKP100 (100MHz FSB clock)
-
CLK100 Frequency
-
100
MHz
-
-
-
Duty Cycle
45
-
55
%
-
-
T1
CLK100 Period
9.997
-
10.20
ns
49-47
1, 6
T2
CLK100 Period Stability
N/A
-
200.00
ps
-
2, 6
-
Frequency Tolerance
-
-
350
ppm
-
-
-
Clock Jitter
-
50
150
ps
-
-
T3
T_PH CLK100 Pulse High Time
3.94
5.00
6.12
ns
49-47
4, 6
T4
T_PL CLK100 Pulse Low Time
3.94
5.00
6.12
ns
49-47
4, 6
T5
CLK100 Rise Time
175
-
700
ps
49-47
3, 5, 6
T6
CLK100 Fall Time
175
-
700
ps
49-47
3, 5, 6
Notes:
1.
The period specified here is the average period. A given period may vary from this specification as governed by the
period Stability specification (T2).
2.
In this context, period stability is defined as the worst case timing difference between successive crossover voltages. In
other words, the largest absolute difference between adjacent clock periods must be less than the period stability.
3.
Slew rate is measured between the 35% and 65% points of the clock swing (VL to VH).
4.
Combining the longest clock-high and clock-low times would violate the max clock period, and that combining the
shortest clock-high and clock-low times would violate the minimum clock period. The clock-high and clock-low times
specify the most extreme allowable combination of clock period and duty cycle.
5.
Slew rate specifications apply to both rising and falling edges.
6.
Guaranteed by design. These values are typical values seen for this process, but not measured during production
testing.
Intel^® EP80579 Integrated Processor Product Line Datasheet
1904
August 2009
Order Number: 320066-003US