eFEX firmware  1.7.3
ATLAS l1-calo - electron and tau feature extraction firmware for eFEX boards

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MultiAdderWithCarry Entity Reference

Multiple Adder with carry: adds many input words in cascade, with carry. More...

Inheritance diagram for MultiAdderWithCarry:
Adder AdderTree AlgoCore_tau_bdt TopAlgoModule IPBusTopAlgoModule data_path_block top_efex_processor

Entities

Behavioral  architecture
 Multiple Adder with carry: adds many input words in cascade, with carry. More...
 

Libraries

IEEE 
work 

Use Clauses

STD_LOGIC_1164 
NUMERIC_STD 
DataTypes  Package <DataTypes>

Generics

stage  integer := 4
delay  integer := 0

Ports

CLK   in   std_logic
  200 MHz clock
IN_Words   in   DataWordsWithCarry ( ( 2 ** stage ) - 1 downto 0 )
OUT_Word   out   DataWordWithCarry

Detailed Description

Multiple Adder with carry: adds many input words in cascade, with carry.

This multi-sage adder works in cascade, adding 2^N numbers together, where N is the number of stages. The minimum latency of the block is N clock cycles (being N the number of stages) A delay might be added to synchronise with outher adders, multipliers, etc.. The total latency is L = N + D clock cycles, where N is the number of stages and D is the delay.

Author
David Reikher, heavily based on MultiAdder by Francesco Gonnella

Definition at line 20 of file MultiAdderWithCarry.vhd.


The documentation for this class was generated from the following file: