Spartan-6 FPGA GTP Transceiver Wizard v1.8 www.xilinx.com 31
UG546 (v1.8) December 14, 2010
Generating the Core
RX OOB, PRBS, and Loss of Sync
The RX OOB, PRBS, and Loss of Sync screen (page 7) of the Wizard (Figure 3-11) provides
configuration options for the RX out of band signal (OOB), PRBS detector, and the loss of
sync state machine settings.
Table 3-16 shows the OOB signal detection options.
X-Ref Target - Figure 3-11
Figure 3-11: RX OOB, PRBS, and Loss of Sync - Page 7
Table 3-16: OOB Signal Detection
Option Description
Use RX OOB Signal Detection
Enables the internal Out-of-Band signal detector (OOB). OOB signal detection is used
for PCI EXPRESS and SATA.
OOB Detection Threshold
Specifies a binary value representing a differential receive signal voltage level. Valid
values are 110 and 111, with 111 recommended. When the signal drops below this
level it is determined to be an OOB signal. This option is not available if the Use RX
OOB signal detection option is not selected.
See the Spartan-6 FPGA GTP Transceivers User Guide for more information about the
OOB Detection Threshold levels.