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- From: luciano@athos.Berkeley.EDU (Luciano Lavagno)
- Subject: Re: asynchronous DSP project at Berkeley
- Message-ID: <1992Nov6.012805.27230@pasteur.Berkeley.EDU>
- Sender: nntp@pasteur.Berkeley.EDU (NNTP Poster)
- Nntp-Posting-Host: athos.berkeley.edu
- Reply-To: luciano@athos.Berkeley.EDU (Luciano Lavagno)
- Organization: UC Berkeley IC CAD Group
- References: <1992Oct27.115210.14352@news.cs.indiana.edu> <LINDER.92Nov5175441@desperado.ERC.MsState.Edu>
- Distribution: na
- Date: Fri, 6 Nov 1992 01:28:05 GMT
- Lines: 41
-
- In article <LINDER.92Nov5175441@desperado.ERC.MsState.Edu>,
- linder@ERC.MsState.Edu (Dan Linder) writes:
- [...]
- >Brodersen is well known in the DSP area so this probably influenced their
- >decision. It is interesting to note that the DSP processor uses
- >microprogramming and Martin's processor only has a few instructions. I
- >suspect as well that the complexity of a modern RISC control unit is beyond
- >current asynchronous techniques. Are there any asynchronous methods that
- >can efficiently combine the generation of a multitude of control signals
- >while also making the complex logical decisions associated with big state
- >machines?
-
- You may look into some of the new approaches to asynchronous circuit synthesis,
- for example:
- 1) methods based on burst-mode finite state machines (i.e. FSM's with a couple
- of restrictions on the valid transitions to avoid possible synchronization
- problems):
- S. Nowick et al, "Automatic Synthesis of Locally-Clocked Asynchronous State
- Machines", ICCAD 91
- T.A. Chu, "Synthesis of Hazard-free Control Circuits from Asynchronous Finite
- State Machine Specifications", TAU 92
-
- 2) methods based on Signal Transition Graphs (i.e. a formalization of timing
- diagrams):
- L. Lavagno et al, "Algorithms for Synthesis of Hazard-free Asynchronous
- Circuits", DAC 91
- C. W. Moon et al, ""Synthesis of Hazard-free Asynchronous Circuits from
- Graphical Specifications", ICCAD 91
- P. A. Beerel et al, "Gate-Level Synthesis of Speed-Independent Asynchronous
- Control Circuits", TAU 92
-
- By the way, burst-mode FSM's can be converted into STG's, so the methods in
- group 2 can directly deal with a network of FSM's as well.
-
- Please, let me know if you need more information on any of the above methods
- (they have all been implemented as CAD programs, as far as I know).
-
- Luciano
- --
- Luciano Lavagno luciano@ic.Berkeley.EDU +1-510-642-5012
- Dept. of EECS, 207-69 Cory Hall, Univ. of California, Berkeley, CA 94720, USA
-