Altera Hardware Description Language

AHDL ( Altera Hardware Description Language ) is a modeling language that was developed by Altera for describing digital hardware. Altera Xilinx belongs next to the largest manufacturers of programmable logic devices.

AHDL is similar to the hardware description language VHDL very, but provides some additional, simpler ways for the specification of state machines and truth tables.

AHDL is especially when using the development tools provided by Altera is available for use. It is thus possible to characterize the behavior of electronic components and modules and predict these means of simulators, without having to build real.

Dominates A circuit simulator, the AHDL is eg SPECTRE.

Sample Code

% A simple AHDL - up counter that was released into the public domain on November 13, 2006% % [ Block quotes by percent sign out] % % As in C must be prototyped features AHDL % % PROTOTYPE:   FUNCTION COUNTER (CLK )          RETURNS ( CNTOUT [ 7 to 0 ]); % % Function declaration where the inputs, outputs and bidirectional pins % Be declared as in C, where square brackets represent data fields % subdesign COUNTER (          CLK: INPUT;          CNTOUT [ 7 to 0 ]: OUTPUT; ) % Variables of flip-flops (such as in this case), tri-state buffers, finite automata to user-defined functions represent % VARIABLE          TIMER [ 7 to 0 ]: DFF; % As with all hardware description languages ​​you can see everything   rather than a wiring of nodes as an algorithm % BEGIN          DEFAULTS                  TIMER [ ] prn = VCC.; % This takes care of d -ff resets %                  TIMER [ ] CLRN = VCC.;          END DEFAULTS;          TIMER [ ] d = TIMER [ ] q H "1".. ; END; see also

  • Examples AHDL Altera (in English)
  • Hardware description language
  • Abbreviation
Finite-state machine
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