Figure 110. IP Parameter Editor Settings
If TX/RX PMA interface width is 64.
For PAM4 mode and data rates greater than
30 Gbps, two adjacent channels
are combined to provide a single PAM4 channel.
So, total 24/2 = 12 PAM4 channels.
Note: You must set the TX PMA tab as well.
B. PMA Direct PAM4 30 Gbps to 57.8 Gbps Implementation