Channel Interface Reconfiguration Mode - Altera Cyclone IV Device Handbook

3–22
The following are the channel reconfiguration mode options:
■ Channel interface reconfiguration
Data rate division at receiver channel
■

Channel Interface Reconfiguration Mode

Enable this option if the reconfiguration of the transceiver channel involves the
following changes:
■ The reconfigured channel has a changed FPGA fabric-Transceiver channel
interface data width
■ The reconfigured channel has changed input control signals and output status
signals
The reconfigured channel has enabled and disabled the static PCS blocks of the
■
transceiver channel
The following are the new input signals available when you enable this option:
■ tx_datainfull—the width of this input signal depends on the number of channels
you set up in the ALTGX MegaWizard Plug-In Manager. It is 22 bits wide per
channel. This signal is available only for Transmitter only and Receiver and
Transmitter configurations. This port replaces the existing tx_datain port.
rx_dataoutfull—the width of this output signal depends on the number of
■
channels you set up in the ALTGX MegaWizard Plug-In Manager. It is 32 bits wide
per channel. This signal is available only for Receiver only and Receiver and
Transmitter configurations. This port replaces the existing rx_dataout port.
The Quartus II software has legality checks for the connectivity of tx_datainfull
and rx_dataoutfull and the various control and status signals you enable in the
Clocking/Interface screen. For example, the Quartus II software allows you to
select and connect the pipestatus and powerdn signals. It assumes that you are
planning to switch to and from PCI Express (PIPE) functional mode.
Cyclone IV Device Handbook,
Volume 2
Chapter 3: Cyclone IV Dynamic Reconfiguration
Dynamic Reconfiguration Modes
November 2011 Altera Corporation