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Home > FPGA Technical Tutorials > Design Recipes for FPGAs Using Verilog and VHDL > Counters

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Counters

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Introduction 

One of the most commonly used applications of flip-flops in practical systems is counters. They are used in microprocessors to count the program instructions (program counter or PC), for accessing sequential addresses in memory (such as ROM) or for checking progress of a test. Counters can start at any value, although most often they start at zero and they can increment or decrement. Counters may also change values by more than one at a time, or in different sequences, such as grey code, binary, or binary coded decimal (BCD) counters. 


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    Manufacturer:Xilinx

  • FPGA XC4000E Family 13K Gates 1368 Cells 0.35um Technology 5V 208-Pin PQFP
  • Product Categories: FPGAs (Field Programmable Gate Array)

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  • XC3S1500-FGG676EGQ

    Manufacturer:Xilinx

  • Xilinx BGA
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    Manufacturer:Xilinx

  • FPGA Spartan-3E Family 1.6M Gates 33192 Cells 572MHz 90nm Technology 1.2V 400-Pin FBGA
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    Manufacturer:Xilinx

  • CPLD CoolRunner XPLA3 Family 1.5K Gates 64 Macro Cells 119MHz 0.35um Technology 3.3V 44-Pin PLCC
  • Product Categories: Programmable logic array

    Lifecycle:Obsolete -

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  • XCR3064XL-7VQ44I

    Manufacturer:Xilinx

  • CPLD CoolRunner XPLA3 Family 1.5K Gates 64 Macro Cells 119MHz 0.35um Technology 3.3V 44-Pin VQFP
  • Product Categories: Programmable logic array

    Lifecycle:Active Active

    RoHS: No RoHS

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