FONT SIZE : AAA
Some functions, like multipliers, are inherently slow if they are implemented by connecting a large number of programmable logic blocks together. Since many applications require these functions, many FPGAs incorporate special hardwired multiplier blocks. These are typically located in close proximity to the embedded RAM blocks introduced in the previous point because these functions are often used in conjunction with each other ( Figure 2-11 ).
Similarly, some FPGAs offer dedicated adder blocks. One operation very common in DSP-type applications is called a multiply-and-a ccumulate (MAC) ( Figure 2-12 ). As its name would suggest, this function multiplies two numbers together and adds the result to a running total stored in an accumulator.
If the FPGA you are working with supplies only embedded multipliers, you will have to implement this function by combining the multiplier with an adder formed from a number of programmable logic blocks, while the result is stored in some associated flip-flops, in a block RAM, or in a number of distributed RAMs. Life becomes a little easier if the FPGA also provides embedded adders, and some FPGAs provide entire MACs as embedded functions.
Manufacturer:Xilinx
Product Categories: Embedded - FPGAs (Field Programmable Gate Array)
Lifecycle:Active Active
RoHS: No RoHS
Manufacturer:Xilinx
Product Categories: FPGAs
Lifecycle:Active Active
RoHS:
Manufacturer:Xilinx
Product Categories: FPGAs (Field Programmable Gate Array)
Lifecycle:Active Active
RoHS:
Manufacturer:Xilinx
Product Categories: Memory - Configuration Proms for FPGA's
Lifecycle:Active Active
RoHS: No RoHS
Manufacturer:Xilinx
Product Categories: Memory - Configuration Proms for FPGA's
Lifecycle:Active Active
RoHS:
Support
