Altera CPRI v6.0 MegaCore Function User Manual
Page 49
various direct interfaces in this format. The only exception is the L1 CSR interface, which transmits and
receives information in individual bits.
Figure 3-12: AUX Interface Data at Different CPRI Line Bit Rates
The AUX interface presents and expects data in fixed 32-bit words. The mapping of the CPRI frame to
and from 32-bit words depends on the CPRI v6.0 IP core bit rate. This figure illustrates how CPRI frame
words are mapped to 32-bit words on the AUX interface 32-bit data bus.
0.6144 Gbps
Line Rate:
1.2288 Gbps
Line Rate:
2.4576 Gbps
Line Rate:
3.072 Gbps
Line Rate:
0 1 2
3
[31:24]
#Z.X.0.0
(1)
#Z.X.4.0
#Z.X.8.0
#Z.X.12.0
[23:16]
#Z.X.1.0
#Z.X.5.0
#Z.X.9.0
#Z.X.13.0
[15:8]
#Z.X.2.0
#Z.X.6.0
#Z.X.10.0
#Z.X.14.0
[7:0]
#Z.X.3.0
#Z.X.7.0
#Z.X.11.0
#Z.X.15.0
0 1
2
...
7
[31:24]
#Z.X. 0.0
(1)
#Z.X.2.0
#Z.X.4.0
...
#Z.X.14.0
[23:16]
#Z.X. 0.1
(1)
#Z.X.2.1
#Z.X.4.1
...
#Z.X.14.1
[15:8]
#Z.X.1.0
#Z.X.3.0
#Z.X.5.0
...
#Z.X.15.0
[7:0]
#Z.X.1.1
#Z.X.3.1
#Z.X.5.1
...
#Z.X.15.1
0 1
2
...
15
[31:24]
#Z.X.0.0
(1)
#Z.X.1.0
#Z.X.2.0
...
#Z.X.15.0
[23:16]
#Z.X.0.1
(1)
#Z.X.1.1
#Z.X.2.1
...
#Z.X.15.1
[15:8]
#Z.X.0.2
(1)
#Z.X.1.2
#Z.X.2.2
...
#Z.X.15.2
[7:0]
#Z.X.0.3
(1)
#Z.X.1.3
#Z.X.2.3
...
#Z.X.15.3
0 1
2
...
18
19
[31:24]
#Z.X.0.0
(1)
#Z.X.0.4
(1)
#Z.X.1.3
...
#Z.X.14.2
#Z.X.15.1
[23:16]
#Z.X.0.1
(1)
#Z.X.1.0
#Z.X.1.4
...
#Z.X.14.3
#Z.X.15.2
[15:8]
#Z.X.0.2
(1)
#Z.X.1.1
#Z.X.2.0
...
#Z.X.14.4
#Z.X.15.3
[7:0]
#Z.X.0.3
(1)
#Z.X.1.2
#Z.X.2.1
...
#Z.X.15.0
#Z.X.15.4
Sequence number on AUX interface
Sequence number on AUX interface
Sequence number on AUX interface
Sequence number on AUX interface
UG-01156
2014.08.18
Direct Interface CPRI Frame Data Format
3-19
Functional Description
Altera Corporation