TLK10002
SLLSE75 –MAY 2011
www.ti.com
NOTE: Latency numbers represent no external skew between lanes. External lane skew will increase overall latency. TX
Datapath latency includes 20xN UI of variance due to deserialization and channel sync.
Figure 17. Latency Variance and Contributions (Only Channel A Shown)
Table 9. CPRI/OBSAI Latency Measurement Function Accuracy
(Undivided Measurement Clock)
LINE RATE
(Gbps)
LATENCY CLOCK FREQUENCY
(GHz)
ACCURACY
RATE
(± ns)
1.2288
1.536
2.4576
3.072
3.84
Eighth
Quarter
Quarter
Half
1.2288
0.768
1.2288
0.768
0.96
0.8138
1.302
0.8138
1.302
Half
1.0417
0.8138
1.302
4.9152
6.144
7.68
Half
1.2288
0.768
0.96
Full
Full
1.0417
0.8138
9.8304
Full
1.2288
24
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