
Chapter 3: 10GBASE-R PHY IP Core 3–21
Dynamic Reconfiguration for Stratix IV Devices
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Dynamic Reconfiguration for Stratix IV Devices
Table 3–16 describes the additional top-level signals 10GBASE-R PHY IP Core when
the configuration uses external modules for PMA control and reconfiguration. You
enable this configuration by turning on Use external PMA control and reconfig
available for Stratix IV GT devices.
Dynamic Reconfiguration for Arria V and Stratix V Devices
For Arria V and Stratix V devices, each channel and each TX PLL have separate
dynamic reconfiguration interfaces. The MegaWizard Plug-In Manager provides
informational messages on the connectivity of these interfaces. Example 3–2 shows
the messages for a single duplex channel.
Although you must initially create a separate reconfiguration interface for each
channel and TX PLL in your design, when the Quartus II software compiles your
design, it reduces the number of reconfiguration interfaces by merging
reconfiguration interfaces. The synthesized design typically includes a
reconfiguration interface for at least three channels because three channels share an
Avalon-MM slave interface which connects to the Transceiver Reconfiguration
Controller IP Core. Conversely, you cannot connect the three channels that share an
Avalon-MM interface to different Transceiver Reconfiguration Controllers. Doing so
causes a Fitter error. For more information, refer to Transceiver Reconfiguration
Controller to PHY IP Connectivity. Allowing the Quartus II software to merge
reconfiguration interfaces gives the Fitter more flexibility in placing transceiver
channels.
Table 3–16. External PMA and Reconfiguration Signals
Signal Name Direction Description
gxb_pdn
Input
When asserted, powers down the entire GT block. Active high. For
Stratix IV de
pll_pdn
Input When asserted, powers down the TX PLL. Active high.
cal_blk_pdn
Input When asserted, powers down the calibration block. Active high.
cal_blk_clk
Input
Calibration clock. For Stratix IV devices only. It must be in the range
37.5–50 MHz. You can use the same clock for the
phy_mgmt_clk
and
the
cal_blk_clk
.
pll_locked
Output When asserted, indicates that the TX PLL is locked.
reconfig_to_xcvr[3:0]
Input
Reconfiguration signals from the Transceiver Reconfiguration Controller
to the PHY device. This signal is only available in Stratix IV devices.
reconfig_from_xcvr
[(<n>/4)17-1:0]
Output
Reconfiguration RAM. The PHY device drives this RAM data to the
transceiver reconfiguration IP. This signal is only available in Stratix IV
devices.
Example 3–2. Informational Messages for the Transceiver Reconfiguration Interface
PHY IP will require 2 reconfiguration interfaces for connection to the external
reconfiguration controller.
Reconfiguration interface offset 0 is connected to the transceiver channel.
Reconfiguration interface offset 1 is connected to the transmit PLL.
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