AX2000 datasheet(7/262 Pages) MICROSEMI

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1-1

1 – General Description

Axcelerator devices offer high performance at densities of up to two million equivalent system gates.

Based upon the Microsemi AX architecture, Axcelerator has several system-level features such as

embedded SRAM (with complete FIFO control logic), PLLs, segmentable clocks, chip-wide highway

routing, and carry logic.

Device Architecture

AX architecture, derived from the highly-successful SX-A sea-of-modules architecture, has been

designed for high performance and total logic module utilization (Figure 1-1). Unlike in traditional FPGAs,

the entire floor of the Axcelerator device is covered with a grid of logic modules, with virtually no chip

area lost to interconnect elements or routing.

Programmable Interconnect Element

The Axcelerator family uses a patented metal-to-metal antifuse programmable interconnect element that

resides between the upper two layers of metal (Figure 1-2 on page 1-2). This completely eliminates the

channels of routing and interconnect resources between logic modules (as implemented on traditional

FPGAs) and enables the efficient sea-of-modules architecture. The antifuses are normally open circuit

and, when programmed, form a permanent, passive, low-impedance connection, leading to the fastest

signal propagation in the industry. In addition, the extremely small size of these interconnect elements

gives the Axcelerator family abundant routing resources.

The very nature of Microsemi's nonvolatile antifuse technology provides excellent protection against

design pirating and cloning (FuseLock technology). Typical cloning attempts are impossible (even if the

security fuse is left unprogrammed) as no bitstream or programming file is ever downloaded or stored in

the device. Reverse engineering is virtually impossible due to the difficulty of trying to distinguish

between programmed and unprogrammed antifuses and also due to the programming methodology of

antifuse devices (see "Security" on page 2-108).

Figure 1-1 •

Sea-of-Modules Comparison

Switch

Matrix

Routing

Logic Block

Logic

Modules

Sea-of-Modules

Architecture

Traditional FPGA

Architecture

AX2000 数据表(PDF) 7 Page - Microsemi Corporation

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