EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 191

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Introduction
Altera Corporation-Preliminary
March 2007
CIII51008-1.0
High-speed differential I/O standards have become popular in
high-speed interfaces because of their significant advantages over
single-ended I/O standards. In response to the current market need,
Altera
including low-voltage differential signaling (LVDS), reduced swing
differential signaling (RSDS), mini-LVDS, and point-to-point differential
signaling (PPDS).
LVDS is the technology of choice from high-speed backplane applications
to high-end switch boxes. LVDS is a low-voltage differential signaling
standard, providing higher noise immunity than single-ended I/O
technologies. Its low-voltage swing allows for high-speed data transfers,
low power consumption, and reduced electromagnetic interference
(EMI). LVDS I/O signaling is a data interface standard defined in the
TIA/EIA-644 and IEEE Std. 1596.3 specifications.
Cyclone III devices can receive LVDS signals at 875 megabits per second
(Mbps) on all I/O banks. Cyclone III devices include dedicated
differential output buffers to transmit LVDS signals at up to 840 Mbps on
the left and right I/O banks, with no external resistors required. The top
and bottom I/O banks can transmit data at up to 640 Mbps using a simple
resistor network.
The RSDS and mini-LVDS standards are derivatives of the LVDS
standard. Because the RSDS and mini-LVDS I/O standards have smaller
voltage swing than does LVDS, they provide increased power benefits
and reduced EMI. National Semiconductor Corporation and Texas
Instruments introduced the RSDS and mini-LVDS specifications,
respectively. Currently, many designers use these specifications for flat
panel display links between the controller and the display column
drivers. Cyclone III devices support the RSDS and mini-LVDS I/O
standards at speeds up to 360 Mbps and 400 Mbps, respectively, at the
dedicated transmitter located on the left and right I/O banks, with no
external resistors required.
The PPDS standard is the next generation of the RSDS standard
introduced by National Semiconductor Corporation. PPDS technology
was introduced to address the requirements for liquid crystal display
(LCD) television interfaces to improve display performance. PPDS
applications include multi-function LCD monitor and high-performance
®
Cyclone
®
III devices support various differential I/O standards,
8. High-Speed Differential
Interfaces in Cyclone III
Devices
Preliminary
8–1