CPRI MegaCore Function Protocol Version Default Value is Invalid

Description

The default value of the tx_prot_version field of the CPRI_TX_PROT_VER register is 0. However, this is not a valid value for this field. Valid values are 1 and 2. Currently, the CPRI MegaCore function recognizes the value 0 as a 1, in system configurations with two CPRI MegaCore function instances connected through a CPRI link. However, this invalid value might not be recognized as a 1 by third-party CPRI partners.

This issue affects all CPRI MegaCore function variations.

The invalid value might not be recognized as a 1 by third-party CPRI partners. In this case, the CPRI MegaCore function and its link partner cannot achieve link synchronization.

Resolution

Immediately following system initialization, set the tx_prot_version field of the CPRI_TX_PROT_VER register to value 1 or 2.

This issue is fixed in version 11.0 of the CPRI MegaCore function.