Spartan-6 LX9 breakout board Rev. 2.0 is both a standalone development board or a mezzanine card on top of the host connection board. Also, the board provides flexible power supply capabilities: screw terminal (VCC_EXT) or pin header J2 (VCC_INT). The switching between EXT and INT power source is done using slider switch SW3. Additionally, the board holds two low-jitter CMOS clock oscillators. The user-available GPIO connections contain 84 pins. The differential pairs are routed with careful line length balancing.
The board provides two independent USB/Virtual COM ports: the user may implement parallel command/data transfer paths to/from the PC. Furthermore, the user may use the dedicated push-button for FPGA reset/reprogram or pin 7 of the J2 pin header (PROGRAM_B). FPGA configuration ready flag (DONE) drives pin 5 of the J2 pin header. Selectable configuration downloading options allow the board usage in a great variety of applications. The bitstream is stored in serial FLASH EEPROM 128 Mbits.
- Two 2x26 pin headers connected to FPGA user-IO pins
- FPGA reset push button or external signal via pin header
- Two high-quality CMOS oscillators (you can select them during ordering)
- Screw terminal for power supply from the external module (+5 … +16 VDC)
- Dedicated pins for power supply via host board (+3.3 VDC)
- Slider switch for power source selection: screw terminal or host board
- Dedicated JTAG port pin header – safe and XILINX ISE software friendly
- 4-channel USB bridge IC (FT4232H)
- Slider switch for selection between USB JTAG/SPI FPGA configuration modes
- Power-OK LED (Green)
- FPGA Configuration Status LED (Blue)
- 128 Mbit EEPROM to store FPGA’s configuration