PPC460EX-SUB800N AMCC, PPC460EX-SUB800N Datasheet - Page 98

• Manufacturer Part Number: PPC460EX-SUB800N
• Manufacturer: AMCC

460EX – PPC460EX Embedded Processor
Table 31. PCI Express Receiver Specification
Table 32. PCI Express Reference Clock Specification
98
Unit Interval (UI)
Frequency offset between transmit and receive clocks
Differential Rx peak-to-peak voltage
Rx AC common mode voltage
Receiver eye time opening
Maximum time delta between median and deviation from median
Total jitter tolerance
Rx differential return loss
Rx common mode return loss
Rx DC differential impedance
Rx DC common mode impedance
Rx DC common mode impedance during reset or power down
Electrical Idle detect threshold
Unexpected Electrical Idle enter detect threshold integration time
Lane-to-Lane output skew
Reference clock frequency
Accuracy
Duty cycle
Peak-to-peak jitter for 1E-6 BER (1 x 10 -6 bit error rate)
Peak-to-peak jitter for 1E-6 BER (1 x 10
Spread Spectrum Clock (SSC) frequency
Differential signal amplitude
Notes:
1. The reference clock frequency specification does not include ±300ppm frequency offset specification.
2. The data rate can be modulated from + 0% to − 0.5% of the nominal data rate frequency, at a modulation rate in the range not exceeding
3. 1E-6 is the probability that the jitter is greater than 86ps peak-to-peak. 1E-12 is the probability that the jitter is greater than 108ps peak-
30kHz–33kHz. The ±300ppm requirement remains which requires the two communcicating ports to be modulated so that they never
exceed a total of 600ppm difference. For most implementations, this requires that both ports have the same bit rate clock source when
the data is modulated with an SSC.
to-peak.
Parameter
Parameter
-12
bit error rate)
Minimum
Minimum
− 300
− 300
400
175
− 10
200
100
200
0.4
0.6
− 6
80
40
65
45
30
–
–
–
–
–
–
Preliminary Data Sheet
Maximum
Maximum
Revision 1.19 – June 17, 2009
+ 300
1200
+ 300
1600
400
150
120
175
100
108
0.3
60
10
20
55
86
33
–
–
–
–
–
Units
Units
MHz
ppm
ppm
kHz
mV
mV
mV
mV
ms
dB
dB
k Ω
ps
UI
UI
UI
ns
ps
ps
%
AMCC Proprietary
Ω
Ω
Notes
Notes
1
3
3
2