EP2C20F256C8N Datasheet, PDF (283/470 Pages) Altera Corporation – Cyclone II Device Handbook, Volume 1

10. Selectable I/O Standards
in Cyclone II Devices
CII51010-2.4
Introduction
f
The proliferation of I/O standards and the need for improved I/O
performance have made it critical that low-cost devices have flexible I/O
capabilities. Selectable I/O capabilities such as SSTL-18, SSTL-2, and
LVDS compatibility allow Cyclone^® II devices to connect to other devices
on the same printed circuit board (PCB) that may require different
operating and I/O voltages. With these aspects of implementation easily
manipulated using the Altera^® Quartus^® II software, the Cyclone II
device family allows you to use low cost FPGAs while keeping pace with
increasing design complexity.
This chapter is a guide to understanding the input and output capabilities
of the Cyclone II devices, including:
■ Supported I/O standards
■ Cyclone II I/O banks
■ Programmable current drive strength
■ I/O termination
■ Pad placement and DC guidelines
For information on hot socketing, refer to the Hot Socketing & Power-On
Reset chapter in volume 1 of the Cyclone II Device Handbook.
For information on ESD specifications, refer to the Altera Reliability Report.
Supported I/O
Standards
f
Cyclone II devices support the I/O standards shown in Table 10–1.
For more details on the I/O standards discussed in this section,
including target data rates and voltage values for each I/O standard,
refer to the DC Characteristics and Timing Specifications chapter in
volume 1 of the Cyclone II Device Handbook.
Altera Corporation
February 2008
10–1