The GTY and GTYP receiver includes a built-in PRBS checker (see the following figure). This checker can be set to check for one of five industry-standard PRBS patterns. The checker is self-synchronizing and works on the incoming data before comma alignment or decoding. This function can be used to test the signal integrity of the channel. When reading out the error counter and cycle counter, the LSB must be read first, then the MSB.
Figure 1. RX Pattern Checker Block
