EP2AGX95EF29C6N Datasheet, PDF (282/380 Pages) Altera Corporation – Device Interfaces and Integration

8–36
Chapter 8: High-Speed Differential I/O Interfaces and DPA in Arria II Devices
Setting Up an LVDS Transmitter or Receiver Channel
Using Both Corner PLLs in Arria II GX Devices
You can use both corner PLLs to drive DPA-disabled channels simultaneously. Both
corner PLLs can drive cross-banks.
You can use a corner PLL to drive all the transmitter channels and you can use the
other corner PLL to drive all DPA-disabled receiver channels in the same I/O bank.
Both corner PLLs can drive duplex channels in the same I/O bank if the channels
driven by each PLL are not interleaved. No separation is necessary between the group
of channels driven by both corner PLLs.
Setting Up an LVDS Transmitter or Receiver Channel
The ALTLVDS megafunction offers you the ease of setting up an LVDS transmitter or
receiver channel. You can control the settings of SERDES and DPA circuitry in the
ALTLVDS megafunction. When you instantiate an ALTLVDS megafunction, the PLL
is instantiated automatically and you can set the parameters of the PLL. This
megafunction simplifies the clocking setup for the LVDS transmitter or receiver
channels. However, the drawback is reduced flexibility when using the PLL.
The ALTLVDS megafunction provides an option for implementing the LVDS
transmitter or receiver interfaces with external PLLs. With this option enabled, you
can control the PLL settings, such as dynamically reconfiguring the PLLs to support
different data rates, dynamic phase shift, and other settings. You also must instantiate
an ALTPLL megafunction to generate the various clock and load enable signals.
f For more information about how to control the PLL, SERDES, and DPA block settings,
and detailed descriptions of the LVDS transmitter and receiver interface signals, refer
to the SERDES Transmitter/Receiver (ALTLVDS) Megafunction User Guide.
f For more information about the ALTPLL megafunction, refer to the Phase Locked-Loops
(ALTPLL) Megafunction User Guide.
Document Revision History
Table 8–9 lists the revision history for this chapter.
Table 8–9. Document Revision History (Part 1 of 2)
Date
Version
Changes Made
July 2012
December 2011
June 2011
December 2010
4.3 Updated Figure 8–23.
■ Updated “Differential Receiver” section.
4.2
■ Minor text edits.
■ Updated Figure 8–2.
4.1
■ Minor text edits.
Updated for the Quartus II software version 10.1 release:
■ Added Arria II GZ device information.
4.0
■ Updated Table 8–3 and Table 8–4.
■ Updated Figure 8–2.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
July 2012 Altera Corporation