10. Selectable I/O Standards
in Cyclone II Devices
CII51010-2.4
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.
Introduction
This chapter is a guide to understanding the input and output capabilities
of the Cyclone II devices, including:
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Supported I/O standards
Cyclone II I/O banks
Programmable current drive strength
I/O termination
Pad placement and DC guidelines
f
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.
Cyclone II devices support the I/O standards shown in Table 10–1.
Supported I/O
Standards
f
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
ALTERA [ ALTERA CORPORATION ]
