Introduction：

The Spartan®-3AN FPGA family combines the best attributes of aleading edge, low cost FPGA with nonvolatile technology across abroad range of densities. The family combines all the features ofthe Spartan-3A FPGA family plus leading technology in-systemFlash memory for configuration and nonvolatile data storage.The Spartan-3AN FPGAs are part of the Extended Spartan-3Afamily, which also includes the Spartan-3A FPGAs and the higherdensity Spartan-3A DSP FPGAs. The Spartan-3AN FPGA familyis excellent for space-constrained applications such as bladeservers, medical devices, automotive infotainment, telematics,GPS, and other small consumer products. Combining FPGA andFlash technology minimizes chip count, PCB traces and overallsize while increasing system reliability.The Spartan-3AN FPGA internal configuration interface iscompletely self-contained, increasing design security. The familymaintains full support for external configuration. The Spartan-3ANFPGA is the world’s first nonvolatile FPGA with MultiBoot,supporting two or more configuration files in one device, allowingalternative configurations for field upgrades, test modes, ormultiple system configurations.

Features：

The new standard for low cost nonvolatile FPGA solutions

• Eliminates traditional nonvolatile FPGA limitations with theadvanced 90 nm Spartan-3A device feature set

• Memory, multipliers, DCMs, SelectIO, hot swap, powermanagement, etc.

• Integrated robust configuration memory

• Saves board space

• Improves ease-of-use

• Simplifies design

• Reduces support issues

• Plentiful amounts of nonvolatile memory available to the user

• Up to 11+ Mb available

• MultiBoot support

• Embedded processing and code shadowing

• Scratchpad memory

• Robust 100K Flash memory program/erase cycles

• 20 years Flash memory data retention

• Security features provide bitstream anti-cloning protection

• Buried configuration interface

• Unique Device DNA serial number in each device fordesign Authentication to prevent unauthorized copying

• Flash memory sector protection and lockdown

• Configuration watchdog timer automatically recovers fromconfiguration errors

• Suspend mode reduces system power consumption

• Retains all design state and FPGA configuration data

• Fast response time, typically less than 100 μs

• Full hot-swap compliance

• Multi-voltage, multi-standard SelectIO™ interface pins

• Up to 502 I/O pins or 227 differential signal pairs

• LVCMOS, LVTTL, HSTL, and SSTL single-ended signalstandards

• 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V signaling

• Up to 24 mA output drive

• 3.3V ±10% compatibility and hot swap compliance

• 622+ Mb/s data transfer rate per I/O

• DDR/DDR2 SDRAM support up to 400 Mb/s

• LVDS, RSDS, mini-LVDS, PPDS, and HSTL/SSTLdifferential I/O

• Abundant, flexible logic resources

• Densities up to 25,344 logic cells

• Optional shift register or distributed RAM support

• Enhanced 18 x 18 multipliers with optional pipeline

• Hierarchical SelectRAM™ memory architecture

• Up to 576 Kbits of dedicated block RAM

• Up to 176 Kbits of efficient distributed RAM

• Up to eight Digital Clock Managers (DCMs)

• Eight global clocks and eight additional clocks per each halfof device, plus abundant low-skew routing

• Complete Xilinx® ISE® and WebPACK™ softwaredevelopment system support

• MicroBlaze™ and PicoBlaze embedded processor cores

• Fully compliant 32-/64-bit 33 MHz PCI™ technology support

• Low-cost QFP and BGA Pb-free (RoHS) packaging options

• Pin-compatible with the same packages in theSpartan-3A FPGA family