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| LEON3 Processor |
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LEON3 is a 32-bit processor core conforming to the IEEE-1754 (SPARC V8) architecture. It is
designed for embedded applications, combining high performance with low complexity and low
power consumption. |
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LEON3 Key Features |
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The LEON3 processor has the following features:
SPARC V8 instruction set with V8e extensions
Advanced 7-stage pipeline
Hardware multiply, divide and MAC units
High-performance, fully pipelined IEEE-754 FPU
Separate instruction and data cache (Harvard architecture) with snooping
Configurable caches: 1 - 4 sets, 1 - 256 kbytes/set. Random, LRR or LRU replacement
Local instruction and data scratch pad rams
SPARC Reference MMU (SRMMU) with configurable TLB
AMBA-2.0 AHB bus interface
Advanced on-chip debug support with instruction and data trace buffer
Symmetric Multi-processor support (SMP)
Power-down mode and clock gating
Robust and fully synchronous single-edge clock design
235MHz typical performance in Nextreme zero mask-charge ASIC
Fault-tolerant and SEU-proof version available for space applications
Extensively configurable
Large range of software tools: compilers, kernels, simulators and debug monitors
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| Features |
Implementation |
| Performance |
235MHz Typical |
| Utilization |
16,800 eCells |
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| LEON3 Peripherals |
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LEON3 is distributed as part of the GRLIB IP library. The GRLIB IP Library is an integrated set of reusable IP cores, designed for system-on-chip (SOC) development. The IP cores are centered on the common on-chip bus, and use a coherent method for simulation and synthesis. |
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The GRLIB library contains the following IP cores:
AHB arbiter/multiplexer with plug&play support
AHB/APB bridge
8/16/32-bits PROM ans SRAM controller
32-bits PC133 SDRAM controller
UART, timer unit, interrupt controller and GPIO port
AHB trace buffer
32-bit Initiator/Target PCI interface (FIFO/DMA)
PCI trace buffer
10/100 Mbit Ethernet MAC
Fully pipelined single- and double-precision IEEE-754 floating-point unit
Technology-independent memory and pad wrappers
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| Software |
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| The software development environment for LEON consists of many open source tools. A package based on a GNU cross-compilation system is available and includes the following tools: |
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GNU C/C++ compiler
Linker, assembler, archiver etc.
Standalone C-library
RTEMS real-time kernel with network support
Boot-prom utility (mkprom)
Remote debugger monitor for gdb
GNU debugger with TK front-end
DDD graphical user interface for gdb
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| Documentation |
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| LEON3 Datasheet for Nextreme |
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