The device’s user manual says the device has quads numbered 0 to 11 and that the quad is normally aligned with port number. This statement is under the title "SerDes Numbering and Port Association" on page 113 of user manual.
However, this device skips ports 10 and 11 on Fig 4.1 on page 61. So the question is:
What SerDes quad is associated with Port 12 and 13?
Cold and Hot Ramp failure (same 89H48H12G2ZCBLGI device):
Le me reach out to our engineering team and see if they have any pointers. This product is obsolete and there many not be any good information that we can provide, but I will certainly check.
I've reached out to Renesas FAE (Mark Lissner) for help and he may channel through the same Eng team for support. Anyway, any help here is much appreciated.