Xilinx 7 Series User Manual

158 www.xilinx.com 7 Series FPGAs GTP Transceivers User Guide
UG482 (v1.9) December 19, 2016
Chapter 4: Receiver
Using RX Polarity Control
RXPOLARITY can be tied High if the polarity of RXP and RXN needs to be reversed.
RX Pattern Checker
Functional Description
The GTP transceiver receiver includes a built-in PRBS checker (see Figure 4-24). This checker can
be set to check for one of four 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.
Table 4-22: RX Polarity Control Ports
Port Dir Clock Domain Description
RXPOLARITY In RXUSRCLK2 The RXPOLARITY port can invert the polarity
of incoming data:
0: Not inverted. RXP is positive and RXN is
negative.
1: Inverted. RXP is negative and RXN is
positive.
X-Ref Target - Figure 4-24
Figure 4-24: RX Pattern Checker Block
SIPO
PRBS-7 Pattern Checker
PRBS-15 Pattern Checker
PRBS-23 Pattern Checker
PRBS-31 Pattern Checker
Error
Counter
(16 bits)
RX_PRBS_ERR_CNT
RXPRBSERR
RXDATA
RXPRBSSEL
Polarity
Inversion
Error
UG482_c4_13_110911
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Xilinx 7 Series Specifications

General

Brand	Xilinx
Model	7 Series
Category	Computer Hardware
Language	English