Xilinx LogiCORE IP Spartan-6 Getting Started Manual page 35

Table 3-20: PCI Express Parameters
Option
To P2
From P2
Transition Time
To/From non-P2
LOOPBACK
RXPOWERDOWN 2-bit PCI EXPRESS-compliant receiver powerdown control signal.
RXSTATUS
RXVALID
TXCOMSTART
TXCOMTYPE
Optional Ports
TXPOWERDOWN
TXDETECTRX
TXELECIDLE
PHYSTATUS
Spartan-6 FPGA GTP Transceiver Wizard v1.8
UG546 (v1.8) December 14, 2010
Integer value between 0 and 65,535. Sets a counter to determine the transition
time to the P2 power state for PCI EXPRESS. See the Spartan-6 FPGA GTP
Transceivers User Guide for details on determining the time value for each count.
The PCI EXPRESS example uses the default setting of 100.
Integer value between 0 and 65,535. Sets a counter to determine the transition
time from the P2 power state for PCI EXPRESS. See the Spartan-6 FPGA GTP
Transceivers User Guide for details on determining the time value for each count.
The PCI EXPRESS example uses the default setting of 60.
Integer value between 0 and 65,535. Sets a counter to determine the transition
time to or from power states other than P2 for PCI EXPRESS. See the Spartan-6
FPGA GTP Transceivers User Guide for details on determining the time value for
each count.
The PCI EXPRESS example uses the default setting of 25.
This option is not available if RXSTATUS encoding format is set to SATA.
3-bit signal to enable the various data loopback modes for testing.
3-bit receiver status signal. The encoding of this signal is dependent on the
setting of RXSTATUS encoding format.
Active-High, PCI Express RX OOB/Beacon signal. Indicates symbol lock and
valid data on RXDATA and RXCHARISK[3:0].
Active-High signal initiates the transmission of the SATA COM sequence
selected by the setting of TXCOMTYPE. This option is not available if
RXSTATUS encoding format is set to PCI EXPRESS. Activate the RXSTATUS
optional port when using this option.
Active-High signal selects SATA COMWAKE sequence when asserted,
otherwise selects COMINIT. The sequence is initiated upon assertion of
TXCOMSTART. This option is not available if RXSTATUS encoding format is
set to PCI EXPRESS.
2-bit PCI EXPRESS-compliant transmitter powerdown control signal.
PIPE interface for PCI EXPRESS specification-compliant control signal.
Activates the PCI EXPRESS receiver detection feature. Function depends on the
state of TXPOWERDOWN, RXPOWERDOWN, TXELECIDLE,
TXCHARDISPMODE, and TXCHARDISPVAL. This port is not available if
RXSTATUS encoding format is set to SATA.
Drives the transmitter to an electrical idle state (no differential voltage). In PCI
EXPRESS mode this option is used for electrical idle modes. Function depends
on the state of TXPOWERDOWN, RXPOWERDOWN, TXELECIDLE,
TXCHARDISPMODE, and TXCHARDISPVAL.
Active-High, PCI EXPRESS receive detect support signal. Indicates completion
of several PHY functions.
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