EP2S130F1020I4 Datasheet, PDF (507/768 Pages) List of Unclassifed Manufacturers – Stratix II Device Handbook, Volume 1

High-Speed Differential I/O Interfaces with DPA in Stratix II and Stratix II GX Devices
■ Unused channels can be within the 25 row span, but all used
channels must be in DPA mode from the same fast PLL. Center fast
PLLs can drive two I/O banks simultaneously, up to 50 channels (25
on the upper bank and 25 on the lower bank) as shown in
Figure 5–21.
■ If one center fast PLL drives DPA channels in the upper and lower
banks, the other center fast PLL cannot be used for DPA.
Figure 5–21. Driving Capabilities of a Center Fast PLL
DPA
DPA
DPA
DPA
DPA
Ref CLK
Fast PLL
Fast PLL
Ref CLK
DPA
DPA
DPA
DPA
Top Channels Driven
by Center PLL
Ref Clk
Center PLL
Used for DPA
Center PLL
Used for DPA
Ref Clk
Bottom Channels
Driven by Center PLL
DPA
Altera Corporation
January 2008
5–23
Stratix II Device Handbook, Volume 2