LEON is a Processeur 32 bit RISC Open source, compatible SPARC V8 (1987) developed by Swedish engineer Jiri GAISLER for ESA.

It is downloadable under license LGPL (version 2) and LPG (version3). A tolerant version with the errors (" Fault Tolerant" - implementing a detection of errors allowing its use in conditions of high radiations) is also accessible for LEON3.

Specifications of the softcore Leon3

The softcore Leon3 is a model of Processeur writes in language VHDL. Like its predecessor, Leon3 is based on an architecture RISC 32 Bit. The source code is entirely available under license LPG.

Characteristics

  • Instruction to standards SPARC with the extension V8

  • Pipeline of 7 stages
  • Contains multiplieurs, dividers and units MAC
  • functions until 125MHz on FPGA and 400MHz on a ASIC 0.13µm
  • Cache of data and separate instructions
  • configurable Cache: 1 on 4 floors, 1 to 256 kbytes per stage. virtual Memory LRU or LRR
  • DRIVEN
  • interface of bus AMBA-2.0

See too

Internal bonds

External bonds

  • Gaisler Research

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