The search functionality is under construction.
The search functionality is under construction.

Keyword Search Result

[Keyword] asynchronous circuit design(2hit)

1-2hit
  • An Asynchronous Circuit Design Technique for a Flexible 8-Bit Microprocessor

    Nobuo KARAKI  Takashi NANMOTO  Satoshi INOUE  

     
    PAPER

      Vol:
    E91-C No:5
      Page(s):
    721-730

    This paper presents an asynchronous design technique, an enabler for the emerging technology of flexible microelectronics that feature low-temperature processed polysilicon (LTPS) thin-film transistors (TFT) and surface-free technology by laser annealing/ablation (SUFTLA®). The first design instance chosen is an 8-bit microprocessor. LTPS TFTs are good for realizing displays having integrated VLSI circuit at lower costs. However, LTPS TFTs have drawbacks, including substantial deviations in characteristics and the self-heating phenomenon. To solve these problems, the authors adopted the asynchronous circuit design technique and developed an asynchronous design language called Verilog+, which is based on a subset of Verilog HDL® and includes minimal primitives used for describing the communications between modules, and the dedicated tools including a translator called xlator and a synthesizer called ctrlsyn. The flexible 8-bit microprocessor stably operates at 500 kHz, drawing 180 µA from a 5 V power source. The microprocessor's electromagnetic emissions are 21 dB less than those of the synchronous counterpart.

  • Dynamically Reconfigurable Logic LSI--PCA-1: The First Realization of the Plastic Cell Architecture

    Hideyuki ITO  Ryusuke KONISHI  Hiroshi NAKADA  Kiyoshi OGURI  Minoru INAMORI  Akira NAGOYA  

     
    PAPER

      Vol:
    E86-D No:5
      Page(s):
    859-867

    This paper describes the realization of a dynamically reconfigurable logic LSI based on a novel parallel computer architecture. The key point of the architecture is its dual-structured cell array which enables dynamic and autonomous reconfiguration of the logic circuits. The LSI was completed by successfully introducing two specific features: fully asynchronous logic circuits and a homogeneous structure, only LUTs are used.