HC4GX15 Datasheet, PDF (462/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–4
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Dynamic Reconfiguration Modes
Regular Transceiver Channels
For the regular transceiver channels, dynamic reconfiguration involves the
reconfiguration of the following:
■ Transceiver channel functional mode
■ Transceiver channel data rate switch
■ Transceiver channel functional mode and data rate switch
However, the following dynamic reconfigurations cannot be achieved for the regular
transceiver channels in the HardCopy IV GX device:
■ Mode switch to and from any ×4 and ×8 configurations
■ Prototype design with Stratix IV GX device is not backward compatible with
Stratix GX or Stratix II GX devices
■ Testability features (Pseudo-Random Binary Sequence [PRBS] and Built-In Self
Test [BIST])
■ Mode switch to and from any ×N Basic (PMA Direct) configuration
■ Mode switch to and from any ×1 Basic (PMA Direct) configuration
1 For more information about dynamic reconfiguration of the CMU channels, refer to
“PMA Controls Reconfiguration” on page 2–52.
Depending on how you want to reconfigure a transceiver channel, the transceiver
channel reconfiguration is further classified into the following dynamic
reconfiguration modes:
■ Data rate division in TX
Data rate division in TX mode is not available for non-Basic (PMA Direct) bonded
configurations, Basic (PMA Direct) ×1, and Basic (PMA Direct) ×N configurations.
For more information, refer to “Data Rate Division in TX Mode” on page 2–63.
■ Channel and TX PLL select/reconfig
■ Channel and CMU PLL reconfiguration
■ Channel reconfiguration with TX PLL select
■ CMU PLL reconfiguration
The modes grouped under Channel and TX PLL select/reconfig mode are not
available for bonded non-Basic (PMA Direct) configurations, Basic (PMA Direct)
×1, and Basic (PMA Direct) ×N configurations. For more information, refer to
“Channel and TX PLL Select/Reconfig Modes” on page 2–68.
Offset cancellation is enabled by default. All other dynamic reconfiguration modes
are available for selection through the reconfig_mode_sel[2:0] signal. Based on
which part of the transceiver channel you want to reconfigure, you can select one or
more of these dynamic reconfiguration modes.
The reconfig_mode_sel[2:0] signal is available as an input to the dynamic
reconfiguration controller only when you select multiple dynamic reconfiguration
modes.
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation