Unit -1Evolution of Programmable DevicesIntroduction to AND-OR structured Programmable Logic

Devices- PROM, PLA, PAL and MPGAs;

Combinational and sequential circuit realization using PROM based Programmable Logic Element (PLE);

Architecture of FPAD, FPLA, FPLS and FPID devices.

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Unit -1Evolution of Programmable Devices

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AND – OR Plane

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PLDsor Programmable Logic Device

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MPGAMask Programmable Logic circuit

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MPGAMask Programmable Logic circuit

I/O pads

Pre –fabricated Transistor

Routing

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Combinational and sequential circuit realization using PROM based Programmable Logic Element (PLE)

Programmable Elements

Fuse Antifuse Switches (Volatile and Non -Volatile)

Volatile – SRAMNon-Volatile – EPROM, EEPROM

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FPAD or FPAAField Programmable Analog Device/ ArrayFPAA is analog IC which is equivalent of FPGA.

It contain a small no. of CAB (Configuration Analog BLock).

CAB contain operational amplifier, programmable capacitorarray and resistor array for configurable switches forswitched capacitor circuits.

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FPAD or FPAAField Programmable Analog Device/ Array

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Switch Matrix built by floating gate transistor

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FPAA Architecture- A different approach

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Routing ArchitectureRouting ArchitectureFPAA

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• Continuous Time Signals• Discrete Time Signals

Discrete Time Signals• Switched Capacitor Design (Current)• Pulse Based Design (Under Research)

CAB ImplementationCAB ImplementationFPAA

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Switched Capacitor Based DesignSwitched Capacitor Based DesignFPAA

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FPLAField Programmable Logic Array

And/Or/Invert architecture with three level fusing

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FPLSField Programmable Logic Sequencer

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FPID(FPIC)Field Programmable Interconnect devices(chips)

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FPID(FPIC)Field Programmable Interconnect devices(chips) An FPIC is not really a logic device but rather a

programmable "wiring" device. Through programming, anFPIC connects one pin on the device to another on the deviceproviding programmable interconnect.

FPICs use either SRAM or anti-fuse programmingtechnology.

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FPID(FPIC)Field Programmable Interconnect devices(chips)

Multi FPGAs connected via FPICs

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Unit -1Evolution of Programmable DevicesWe Covered ...........

Introduction to AND-OR structured Programmable Logic Devices-PROM, PLA, PAL and MPGAs;

Combinational and sequential circuit realization using PROM based Programmable Logic Element (PLE);

Architecture of FPAD, FPLA, FPLS and FPID devices.

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End of Unit -1

Thanks

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