Quad-Core LEON4  Evaluation Board

The GR-CPCI-LEON4-N2X evaluation board has been designed for evaluation of the Cobham Gaisler LEON4 Next Generation Microprocessor (NGMP) functional prototype device. The prototype is a system-on-chip with four 32-bit LEON4 SPARC V8 processor cores connected to a shared 256 KiB Level-2 cache and several high-speed interfaces, including an 8-port SpaceWire router and dual gigabit Ethernet interfaces. The architecture provides improved support for debugging and software partitioning together with extended support for both symmetric and asymmetric multiprocessing. The space-grade successor for this NGMP functional prototype is the Rad-Hard GR740 device. There are several differences between the GR740 device and the LEON4-N2X functional prototype and users who intend to target GR740 are recommended to use the GR-CPCI-GR740 development board.

The board is a custom designed PCB in a 6U Compact PCI (CPCI) format, making the board suitable for stand-alone bench top development, or if required, to be mounted in a 6U CPCI Rack. The principle interfaces and functions are accessible on the front and back edges of the board, and secondary interfaces via headers on the board.

Features

• Quad-Core 32-bit LEON4 SPARC V8 processor
• 6U Compact PCI format
• On board memory

- DDR2 SDRAM SODIMM sockets, providing 96-bit wide interface with up to 2 GiB of data memory
- PC100 SDRAM, 96-bit wide interface providing 128 MiB of data memory
- NOR Flash PROM, 8 MiB, both 8- and 16-bit wide operation

• Debug communication links: SpaceWire, USB 2.0, Ethernet, JTAG
• Interfaces at front edge of board:

- Dual 10/100/1000 Mbit Ethernet interface
- Dual-redundant MIL-STD-1553B interface
- 8-port SpaceWire interface
- SpaceWire Debug Communication Link interface
- 16 bit General Purpose I/O (ribbon cable style connector)
- USB-to-Serial interface providing access to UARTs and JTAG debug interface

• Interfaces at back edge of board:

- Compact PCI interface (32 bit, 33/66MHz), configurable for Host or Peripheral slot
- Input power connectors for stand-alone use

• Interfaces on board:

- DIP switches for GPIO and bootstrap signal configuration
- LED indicators
- SPI interface
- Two Serial UART interface (RS232)
- JTAG debug interface

Specifications

• Cobham Gaisler LEON4-N2X (NGMP functional prototype) in FC896 package
• Processor core frequency: 150 MHz
• Compact PCI 6U form factor (233.5mm x 160mm) 
• Memory

- DDR2-600 SDRAM, 1 bank 96 bits wide, DDR2-SODIMM sockets
- PC100 SDRAM, 1 bank 96 bits wide, 6x256 Mbit, discrete chips
- Parallel Boot Flash (64 Mbit, both 8- and 16-bit wide operation)

• Dual RJ45 10/100/1000 Mbit GMII/MII Ethernet interface (KSZ9021GN with RJ45 jack)
• 8 SpaceWire interfaces (MDM9S)
• SpaceWire Debug Communication Link (MDM9S)
• USB 2.0 Debug Communication Link (ISP1504A with USB Mini-AB) interface
• 16 bit General Purpose I/O (34 pin 0.1” ribbon cable style connector)
• Dual-redundant MIL-STD-1553B Interface (DE9)
• FTDI Serial to USB interface (FT2232H with USB Mini-AB)
• DIP switches for GPIO signal configuration
• DIP switch for Memory interface configuration
• SPI interface user connections on 0.1” header
• SPI Temperature Sensor
• Two Serial UART interface (RS232) with DE9 female connectors
• JTAG Debug Communication Link
• Test connector for boundary scan
• 4-pin Molex style and 2.1 mm jack power connectors
• Push buttons for RESET and BREAK
• LED indicators for POWER, ERRORN, DSU active and GPIO
• Assorted jumpers and test points for configuration and test of the board
• Power, reset, clock and auxiliary circuits
• MMCX connectors for external clock sources
• AMP connector for memory mapped I/O

Documentation

There are differences in between the GR740 device and the NGMP functional prototype and these are described in the GR740 Comparison document available on the GR740 product page.