81348 Datasheet, PDF (69/89 Pages) Intel Corporation – Two Integrated Intel XScale processors

Electrical Specifications—Intel^® 81348
Table 22. PCI Express Clock Timings
Symbol
Parameter
Min. Nom. Max. Units
Notes
TF2 PCI Express* Clock Frequency
100
MHz 4
TC2 PCI Express* Clock Cycle Time
9.872
ns
DF0 Frequency Variation
-300
300 ppm
TCCJ Cycle to Cycle Jitter
125
ps
TPPJ Peak to Peak Jitter (5–50 MHz)
50
ps
Dc Clock Duty Cycle
45
55
%
Trise REFCLK Rise Time
175
350
ps 1, 2, 6
Tfall REFCLK Fall Time
175
350
ps 1, 2, 6
Tvrise REFCLK Rise Time Variation
125
ps
Tvfall REFCLK Fall Time Variation
125
ps
Rise-Fall Matching
20
%
Vca Absolute Cross Point
0.25
0.55
V 1, 3, 7, 13
Vcr Relative Cross Point
Calc
Calc
5, 12
Tvc Total Variation of Vc over all edges
0.14
V 13
Rising Edge Ringback
0.56
V Absolute Min.
Falling Edge Ringback
0.25
V Absolute Max.
Vhi High Level Voltage
0.66 0.71 0.85
V 7, 8
Vli Low Level Voltage
-0.15
0
0.15
V 7, 9
Vrb Ringback Voltage
0.10
V7
Vovs Maximum Overshoot
Vhi+0.3 V 7, 10
Vuds Minimum Undershoot
-0.30
V 7, 11
Notes:
1. Measured at crossing point where the instantaneous voltage value of the rising edge of REFCLK equals the falling edge
of REFCLK#.
2.
3.
MTmheoiasnsomutroeenadiscufrtrhoemrmoeuVng_{OthLrte=hfee0r.Vs1Ot7Lo5ttoVheVtoOtoH}Vta_{OrelHgv=iaorn0ia.ft5oio2rn5TfR}Vr_I.o_SmVEaaltinhddeoTlno_Flwy_ALefLso.tr
rising REFCLK
crossing point
and falling REFCLK#. Signal
to the highest, regardless of
must
which
be
edge
is
crossing.
4.
5.
6.
MTVVVh^CCCee^RRRa^OOOsa^SSSuv^SSSre(((errrrmaeeegllle)))enMMMtpiiaentnxari=kao=ned0nd0.o.5fM5vroea((mVrxV^hahaasn^arvi^veyngggd1--lee0^{µ0-r.sie.7v7n1pe1dd0e0er))uido+s+dwin0ao0g.vf.25ett5h5fim0oe0remfom.llouwsitnbge: greater than the minimum specified period.}
7. Measurement taken from differential waveform.
8.
910. _.
VOV_{HLvOIeGWrHsihsisododetefifisninedededfaianssetdthheaessstttahatetisisattibcicsaaolllauavtveeerrvaaaggleueeLHooiwgf} htvhavelaumlueaeaxsaimsoboubtmatianvineodeltdabgbyey.uusisninggththeeOOscsiclliollsocsocpoepeVV_{LOHWIGHMaMtahthfufnucntciotnio.n.}
11. Undershoot is defined as the absolute value of the minimum voltage.
12. The crossing point must meet the absolute and relative crossing point specifications simultaneously.
13.
14.
R^{∆mVeafCxeRirOmtS}ou^{SmSiseadcltleoiofwinnee4dd.3va.as2r.ita1hneicnteothitnaelV}P^vCC^aRrI^OiaE^StSx^iop^fnr^oe^ros^afs^naB^yla^{l p}s^cae^rorS^tsisp^ciue^nlc^gaif^rvic^soa^ylt^tsi^ao^tgen^{emsfo. or finRfiosrinmgaRtiEonFCrLeKgaarnddinFgaPllPinMg}
REFCLK#. This
considerations.
is
the
December 2007
Order Number: 315038-003US
Intel^® 81348 I/ODParotacsehsesoert
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