xc4vlx15 Xilinx Corp., xc4vlx15 Datasheet - Page 4

• Manufacturer Part Number: xc4vlx15
• Description: Fpga Virtex-4 Family Overview
• Manufacturer: Xilinx Corp.

Architectural Description: Virtex-4 Array Overview
Virtex-4 devices are user-programmable gate arrays with
various configurable elements and embedded cores opti-
mized for high-density and high-performance system
designs. Virtex-4 devices implement the following function-
ality:
•
•
•
•
Virtex-4 Features
This section briefly describes the features of the Virtex-4 family of FPGAs.
Input/Output (SelectIO) Blocks
IOBs are programmable and can be categorized as follows:
•
•
•
•
•
•
•
The IOB registers are either edge-triggered D-type flip-flops
or level-sensitive latches.
IOBs support the following single-ended standards:
•
•
•
•
•
•
DS112 (v3.0) September 28, 2007
Product Specification
I/O blocks provide the interface between package pins
and the internal configurable logic. Most popular and
leading-edge I/O standards are supported by
programmable I/O blocks (IOBs). The IOBs are
enhanced for source-synchronous applications.
Source-synchronous optimizations include per-bit
deskew, data serializer/deserializer, clock dividers, and
dedicated local clocking resources.
Configurable Logic Blocks (CLBs), the basic logic
elements for Xilinx FPGAs, provide combinatorial and
synchronous logic as well as distributed memory and
SRL16 shift register capability.
Block RAM modules provide flexible 18Kbit true
dual-port RAM, that are cascadable to form larger
memory blocks. In addition, Virtex-4 block RAMs
contain optional programmable FIFO logic for
increased device utilization.
Cascadable embedded XtremeDSP slices with 18-bit x
18-bit dedicated multipliers, integrated Adder, and
48-bit accumulator.
Programmable single-ended or differential (LVDS)
operation
Input block with an optional single data rate (SDR) or
double data rate (DDR) register
Output block with an optional SDR or DDR register
Bidirectional block
Per-bit deskew circuitry
Dedicated I/O and regional clocking resources
Built in data serializer/deserializer
LVTTL
LVCMOS (3.3V, 2.5V, 1.8V, and 1.5V)
PCI (33 and 66 MHz)
PCI-X
GTL and GTLP
HSTL 1.5V and 1.8V (Class I, II, III, and IV)
R
www.xilinx.com
•
Additionally, FX devices support the following embedded
system functionality:
•
•
•
The general routing matrix (GRM) provides an array of rout-
ing switches between each component. Each programma-
ble element is tied to a switch matrix, allowing multiple
connections to the general routing matrix. The overall pro-
grammable interconnection is hierarchical and designed to
support high-speed designs.
All
resources, are controlled by values stored in static memory
cells. These values are loaded in the memory cells during
configuration and can be reloaded to change the functions
of the programmable elements.
•
The DCI I/O feature can be configured to provide on-chip
termination for each single-ended I/O standard and some
differential I/O standards.
The IOB elements also support the following differential sig-
naling I/O standards:
•
•
•
•
•
•
Two adjacent pads are used for each differential pair. Two or
four IOB blocks connect to one switch matrix to access the
routing resources.
Per-bit deskew circuitry allows for programmable signal
delay internal to the FPGA. Per-bit deskew flexibly provides
fine-grained increments of delay to carefully produce a
range of signal delays. This is especially useful for synchro-
nizing signal edges in source synchronous interfaces.
Digital Clock Manager (DCM) blocks provide
self-calibrating, fully digital solutions for clock
distribution delay compensation, clock
multiplication/division, and coarse-/fine-grained clock
phase shifting.
Integrated high-speed serial transceivers enable data
rates up to 6.5 Gb/s per channel.
Embedded IBM PowerPC 405 RISC CPU (up to
450 MHz) with the auxiliary processor unit interface
10/100/1000 Ethernet media-access control (EMAC)
cores.
SSTL 1.8V and 2.5V (Class I and II)
LVDS and Extended LVDS (2.5V only)
BLVDS (Bus LVDS)
ULVDS
Hypertransport™
Differential HSTL 1.5V and 1.8V (Class II)
Differential SSTL 1.8V and 2.5V (Class II)
programmable
elements,
Virtex-4 Family Overview
including
the
routing
4