Altera SerialLite II IP Core - Manual (Page 50)

Chapter 3: Parameter Settings 3–27
Transceiver Configuration
January 2014 Altera Corporation SerialLite II MegaCore Function
User Guide
■ Dynamic reconfiguration and offset cancellation for Arria II GX devices, refer to
the
AN 558: Implementing Dynamic Reconfiguration in Arria II GX .
■ Dynamic reconfiguration and offset cancellation for Stratix IV devices, refer to the
Stratix IV Dynamic Reconfiguration chapter in the Stratix IV Device Handbook.
■ Dynamic reconfiguration and using the Altera Reconfiguration Controller for
Arria V, Cyclone V, and Stratix V devices, refer to the
Altera Transceiver PHY IP Core
User Guide .
ALTGX Support Signals
This section describes the ALTGX support signals, which are only present on variants
that use the Arria II GX and Stratix IV integrated PHY. They are connected directly to
the ALTGX instance. In many cases these signals must be shared with ALTGX
instances that are implemented in the same device. The following signals exist:
■ cal_blk_clk
■ reconfig_clk
■ reconfig_togxb
■ reconfig_fromgxb
■ gxb_powerdown
Table 3–11 describes these ALTGX support signals.
Table 3–11. ALTGX Support Signals
Signal I/O Description
cal_blk_clk I
The cal_blk_clk input signal is connected to the ALTGX calibration block clock
(cal_blk_clk) input. All instances of ALTGX in the same device must have their
cal_blk_clk
inputs connected to the same signal because there is only one
calibration block per device. This input should be connected to a clock operating as
recommended by the
Arria II GX Device Handbook or the Stratix IV Device Handbook .
reconfig_clk I
The reconfig_clk input signal is the ALTGX dynamic reconfiguration clock. This
signal must be connected as described in the
Arria II GX Device Handbook or the
Stratix IV Device Handbook if the ALTGX dynamic reconfiguration block is used.
Otherwise, this signal must be set to 1'b0.
reconfig_togxb I
The reconfig_togxb [N:0] input signal is driven from an external dynamic
reconfiguration block. The signal supports the selection of multiple transceiver
channels for dynamic reconfiguration. This signal must be connected as described in
the
Arria II GX Device Handbook or the Stratix IV Device Handbook if the external
dynamic reconfiguration block is used. Otherwise, you must set this signal to
4'b0010
for Arria II GX and Stratix IV devices.
N value is 3 for Arria II GX and Stratix IV devices.