Xilinx Virtex-6 FPGA User Manual page 193

Table 4-9: RX OOB Ports
Port Direction
RXSTATUS[2:0]
RXVALID
X-Ref Target - Figure 4-8
Table 4-10
Table 4-10: RX OOB Attributes
Attribute
OOBDETECT_THRESHOLD
SAS_MAX_COMSAS
SAS_MIN_COMSAS
SATA_BURST_VAL
SATA_IDLE_VAL
SATA_MAX_BURST
SATA_MAX_INIT
SATA_MAX_WAKE
SATA_MIN_BURST
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Virtex-6 FPGA GTX Transceivers User Guide
UG366 (v2.5) January 17, 2011
Clock Domain
Out RXUSRCLK2
Out RXUSRCLK2
PMA
(RX Signal
Detection
Logic)
Figure 4-8: Optional Ports GATERXELECIDLE and IGNORESIGDET
defines the RX OOB attributes.
Type
3-bit Binary
6-bit Hex
6-bit Hex
3-bit Binary
3-bit Binary
6-bit Hex
6-bit Hex
6-bit Hex
6-bit Hex
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RXSTATUS[2:0] are used only for PCIe mode, as defined by the
PIPE specification.
Indicates symbol lock and valid data on RXDATA and
RXCHARISK[3:0] when High, as defined in the PIPE
specification.
GATERXELECIDLE
IGNORESIGDET
Description
Sets the minimum differential voltage between RXN and RXP.
When the differential voltage drops below this level, the incoming
signal is considered an OOB signal. This 3-bit binary encoded
attribute has the following nominal values of the OOB threshold
(1)
voltage :
Value OOB Nominal Threshold Voltage (mV)
000 – 010
011 (default)
100 – 111
Upper bound on the idle count during COMSAS for SAS
Lower bound on the idle count during COMSAS for SAS
Number of bursts to declare a COM match for SAS/SATA
Number of idles to declare a COM match for SAS/SATA
Upper bound on an activity burst for COM FSM for SAS/SATA
Upper bound on idle count during COMINIT/COMRESET for
SAS/SATA
Upper bound on idle count during COMWAKE for SAS/SATA
Lower bound on an activity burst for COM FSM for SAS/SATA
RX Out-of-Band Signaling
Description
RXELECIDLE
GTX
Transceivers
Logic
UG366_c4_49_072309
Reserved
100
Reserved
193