Xilinx LogiCORE IP Spartan-6 User Manual

Spartan-6 FPGA GTP Transceiver Wizard v1.8 www.xilinx.com 35
UG546 (v1.8) December 14, 2010
Generating the Core
Table 3-20: PCI Express Parameters
Option Description
Transition Time
To P2
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.
From P2
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.
To/From non-P2
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.
Optional Ports
LOOPBACK 3-bit signal to enable the various data loopback modes for testing.
RXPOWERDOWN 2-bit PCI EXPRESS-compliant receiver powerdown control signal.
RXSTATUS
3-bit receiver status signal. The encoding of this signal is dependent on the
setting of RXSTATUS encoding format.
RXVALID
Active-High, PCI Express RX OOB/Beacon signal. Indicates symbol lock and
valid data on RXDATA and RXCHARISK[3:0].
TXCOMSTART
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.
TXCOMTYPE
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.
TXPOWERDOWN 2-bit PCI EXPRESS-compliant transmitter powerdown control signal.
TXDETECTRX
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.
TXELECIDLE
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.
PHYSTATUS
Active-High, PCI EXPRESS receive detect support signal. Indicates completion
of several PHY functions.

Xilinx LogiCORE IP Spartan-6 Specifications

General

Brand	Xilinx
Model	LogiCORE IP Spartan-6
Category	Transceiver
Language	English