User guide

7–48 Chapter 7: IP Core Interfaces
Physical Layer Interface Signals
Cyclone V Hard IP for PCI Express December 2013 Altera Corporation
User Guide
Transceiver Reconfiguration
Table 7–23 describes the transceiver support signals. In Table 7–23, <n> is the number
of lanes.
f For more information about the Transceiver Reconfiguration Controller, refer to the
“Transceiver Reconfiguration Controller” chapter in the Altera Transceiver PHY IP Core
User Guide.
The following sections describe signals for the serial or parallel PIPE interfaces. The
PIPE interface is only available for simulation.
Serial Interface Signals
Table 7–24 describes the serial interface signals.
f Refer to Pin-out Files for Altera Devices for pin-out tables for all Altera devices in
.pdf, .txt, and .xls formats.
1 Transceiver channels are arranged in groups of six. For GX devices, the lowest six
channels on the left side of the device are labeled GXB_L0, the next group is GXB_L1,
and so on. Channels on the right side of the device are labeled GXB_R0, GXB_R1, and
so on. Be sure to connect the Hard IP for PCI Express on the left side of the device to
appropriate channels on the left side of the device, as specified in the Pin-out Files for
Altera Devices.
Table 7–23. Transceiver Control Signals
Signal Name I/O Description
reconfig_fromxcvr[(<n>70)-1:0]
reconfig_toxcvr[(<n>46)-1:0]
O
These are the parallel transceiver dynamic reconfiguration buses.
Dynamic reconfiguration is required to compensate for variations due to
process, voltage and temperature (PVT). Among the analog settings that
you can reconfigure are: V
OD
, pre-emphasis, and equalization.
You can use the Altera Transceiver Reconfiguration Controller to
dynamically reconfigure analog settings in Cyclone V devices. For more
information about instantiating the Altera Transceiver Reconfiguration
Controller IP core refer to Chapter 15, Transceiver PHY IP
Reconfiguration.
busy_xcvr_reconfig I
When asserted, indicates that the a reconfiguration operation is in
progress.
Table 7–24. 1-Bit Interface Signals
Signal I/O Description
tx_out [<n-1>:0]
(1)
O Transmit input. These signals are the serial outputs.
rx_in [<n-1>:0]
(1)
I Receive input. These signals are the serial inputs.
Note to Table 7–24:
(1) <n> = 1 for the ×1 IP core. <n> = 2for the ×2 IP core. <n> = 4 for the ×4 IP core.