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Xilinx Universal PLD Devices

Universal PLD Devices

The XCR22V10 is the first SPLD to combine high perfor-mance with low power, without the need for "turbo bits" orother power down schemes. To achieve this, Xilinx hasused their FZP design technique, which replaces conven-tional sense amplifier methods for implementing productterms (a technique that has been used in PLDs since thebipolar era) with a cascaded chain of pure CMOS gates.This results in the combination of low power and highspeed that has previously been unattainable in the PLDarena. For 3V operation, Xilinx offers the XCR22LV10 thatoffers high speed and low power in a 3V implementation.

The XCR22V10 uses the familiar AND/OR logic arraystructure, which allows direct implementation ofsum-of-products equations. This device has a programma-ble AND array which drives a fixed OR array. The OR sumof products feeds an "Output Macro Cell" (OMC), which canbe individually configured as a dedicated input, a combina-torial output, or a registered output with internal feedback.

The XCR22V10 implements logic functions assum-of-products expressions in a programmable-AND/fixed-OR logic array. User-defined functions are cre-ated by programming the connections of input signals intothe array. User-configurable output structures in the form ofI/O macrocells further increase logic flexibility.

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