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54SXXX Scheda tecnica(PDF) 4 Page - List of Unclassifed Manufacturers

Il numero della parte 54SXXX
Spiegazioni elettronici  54SX Family FPGAs
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Produttore elettronici  ETC1 [List of Unclassifed Manufacturers]
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54SXXX Scheda tecnica(HTML) 4 Page - List of Unclassifed Manufacturers

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54S X Fam ily FPG A s
4
v3.1
SX Family Arc h itect ure
The SX family architecture was designed to satisfy
next-generation performance and integration requirements
for production-volume designs in a broad range of
applications.
Pro g ram m a bl e In terc o n n e ct Ele m en t
The SX family provides efficient use of silicon by locating the
routing interconnect resources between the Metal 2 (M2)
and Metal 3 (M3) layers (Figure 1). This completely
eliminates the channels of routing and interconnect
resources between logic modules (as implemented on SRAM
FPGAs and previous generations of antifuse FPGAs), and
enables the entire floor of the device to be spanned with an
uninterrupted grid of logic modules.
Interconnection between these logic modules is achieved
using
Actel’s
patented
metal-to-metal
programmable
antifuse interconnect elements, which are embedded
between the M2 and M3 layers. The antifuses are normally
open circuit and, when programmed, form a permanent
low-impedance connection.
The extremely small size of these interconnect elements
gives the SX family abundant routing resources and provides
excellent protection against design pirating. Reverse
engineering is virtually impossible because it is extremely
difficult
to
distinguish
between
programmed
and
unprogrammed antifuses, and there is no configuration
bitstream to intercept.
Additionally, the interconnect (i.e., the antifuses and metal
tracks) have lower capacitance and lower resistance than
any other device of similar capacity, leading to the fastest
signal propagation in the industry.
L o gi c Mod u l e De si gn
The
SX
family
architecture
is
described
as
a
“sea-of-modules” architecture because the entire floor of
the device is covered with a grid of logic modules with
virtually no chip area lost to interconnect elements or
routing. Actel’s SX family provides two types of logic
modules, the register cell (R-cell) and the combinatorial
cell (C-cell).
The R-cell contains a flip-flop featuring asynchronous clear,
asynchronous preset, and clock enable (using the S0 and S1
lines) control signals (Figure 2 on page 5). The R-cell
registers feature programmable clock polarity selectable on
a register-by-register basis. This provides additional
flexibility while allowing mapping of synthesized functions
into the SX FPGA. The clock source for the R-cell can be
chosen from either the hard-wired clock or the routed clock.
Figure 1 • SX Family Interconnect Elements
Silicon Substrate
Tungsten Plug
Contact
Metal 1
Metal 2
Metal 3
Routing Tracks
Amorphous Silicon/
Dielectric Antifuse
Tungsten Plug Via
Tungsten Plug Via


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