EP3SL150F780I3N Altera, EP3SL150F780I3N Datasheet - Page 345

• Manufacturer Part Number: EP3SL150F780I3N
• Description: Stratix III
• Manufacturer: Altera

Altera Corporation
November 2007
Guidelines for DPA-Disabled Differential Channels
When DPA-disabled channels are used in the left and right banks of a
Stratix III device, you must adhere to the guidelines in the following
sections.
DPA-Disabled Channels and Single-Ended I/Os
The placement rules for DPA-disabled channels and single-ended I/Os
are the same as those for DPA-enabled channels and single-ended I/Os.
DPA-Disabled Channel Driving Distance
Each left/right PLL can drive all the DPA-disabled channels in the entire
bank.
Using Corner and Center Left/Right PLLs
■
■
A corner left/right PLL can be used to drive all transmitter channels
and a center left/right PLL can be used to drive all DPA-disabled
receiver channels within the same differential bank. In other words,
a transmitter channel and a receiver channel in the same LAB row
can be driven by two different PLLs, as shown in
A corner left/right PLL and a center left/right PLL can drive duplex
channels in the same differential bank as long as the channels driven
by each PLL are not interleaved. No separation is necessary between
the group of channels driven by the corner and center left/right
PLLs. See
High-Speed Differential I/O Interfaces and DPA in Stratix III Devices
Figure 9–23
and
Figure
Stratix III Device Handbook, Volume 1
9–24.
Figure
9–23.
9–29