EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 240

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Stratix III I/O Structure
7–22
Stratix III Device Handbook, Volume 1
f
Programmable Pre-Emphasis
Stratix III LVDS transmitters support programmable pre-emphasis to
compensate the frequency dependent attenuation of the transmission
line. The Quartus II software allows four settings for programmable pre-
emphasis.
For more information about programmable pre-emphasis, refer to the
High-Speed Differential I/O Interfaces with DPA in the Stratix III
chapter in volume 1 of the Stratix III Device Handbook.
Programmable Differential Output Voltage
Stratix III LVDS transmitters support programmable VOD. The
programmable VOD settings enable you to adjust output eye height to
optimize for trace length and power consumption. A higher VOD swing
improves voltage margins at the receiver end while a smaller VOD swing
reduces power consumption. Quartus II allows four settings for
programmable VOD.
For more information on programmable VOD, refer to the
Differential I/O Interfaces with DPA in the Stratix III Devices
volume 1 of the Stratix III Device Handbook.
MultiVolt I/O Interface
The Stratix III architecture supports the MultiVolt
that allows Stratix III devices in all packages to interface with systems of
different supply voltages.
The VCCIO pins can be connected to a 1.2-, 1.5-, 1.8-, 2.5-, 3.0-V, or 3.3-V
power supply, depending on the output requirements. The output levels
are compatible with systems of the same voltage as the power supply.
(For example, when VCCIO pins are connected to a 1.5-V power supply,
the output levels are compatible with 1.5-V systems).
TM
I/O interface feature
Altera Corporation
November 2007
chapter in
High Speed
Devices