Line Speed Capability Register (0xD) - Line Speed Capability Register (0xD) - 8.12 English - PG056

CPRI LogiCORE IP Product Guide (PG056)
Document ID
PG056
Release Date
2025-12-03
Version
8.12 English

The bits in this register define the line speeds that the core should use.

Table 1. Line Speed Capability Register
Bits Description
31:15 Reserved
14 Capable of 24,330.24 Mb/s FEC Enabled Mode (Versal GTY/GTYP or UltraScale GTYE3/GTYE4 only)
13 Capable of 12,165.12 Mb/s FEC Enabled Mode (Versal GTY/GTYP or UltraScale GTYE3/GTYE4 only)
12 Capable of 10,137.6 Mb/s FEC Enabled Mode (Versal GTY/GTYP or UltraScale GTYE3/GTYE4 only)
11 Capable of 8,110.08 Mb/s FEC Enabled Mode (Versal GTY/GTYP or UltraScale GTYE3/GTYE4 only)
10 Capable of 24,330.24 Mb/s (Versal GTY/GTYP or UltraScale GTYE3/GTYE4 only)
9 Capable of 12,165.12 Mb/s
8 Capable of 8,110.08 Mb/s
7 Capable of 10,137.6 Mb/s
6 Capable of 9,830.4 Mb/s
5 Capable of 6,144.0 Mb/s
4 Capable of 4,915.2 Mb/s
3 Capable of 3,072.0 Mb/s
2 Capable of 2,457.6 Mb/s
1 Capable of 1,228.8 Mb/s (Not available Versal GTY/GTYP)
0 Capable of 614.4 Mb/s (Not available Versal GTY/GTYP)
  1. Setting 000 0000 0000 0000 disables the core.
  2. In cores that do not support 6,144.0 Mb/s operation, writes to bits 4 through 14 are ignored.

    In cores that do not support 9,830.4 Mb/s operation, writes to bits 6 through 14 are ignored.

    In cores that do not support 10,137.6 Mb/s operation, writes to bits 7 through 14 are ignored.

    In cores that do not support 12,165.12 Mb/s operation, writes to bits 8 through 14 are ignored.

    In cores that do not support 24,330.24 Mb/s operation, writes to bits 10 through 14 are ignored.

    In cores that do not support FEC operation, writes to bits 11 through 14 are ignored.

The following table shows the default values for the Line Speed Capability Register, depending on the speed capability that is selected.

Table 2. Line Speed Capability Register Default Values
Core Speed Capability Line Speed Capability Register (0xD) Default Values
24,330.24 Mb/s 368.64 MHz reference clock: 000 0111 0000 0000

245.76 MHz reference clock: 000 0111 1111 1111
24,330.24 Mb/s with FEC 368.64 MHz reference clock: 111 1111 0000 0000

245.76 MHz reference clock: 111 1111 1111 1111
12,165.12 Mb/s 368.64 MHz reference clock: 000 0011 0000 0000

307.20 and 245.76 MHz reference clock: 000 0011 1111 1111
10,137.6 Mb/s 000 0000 1111 1111
9,830.4 Mb/s 000 0000 0111 1111
6,144.0 Mb/s 000 0000 0011 1111
4,915.2 Mb/s 000 0000 0001 1111
3,072.0 Mb/s 000 0000 0000 1111