Demand Peripherals     Robotics and Automation Made Easy

BASEBOARD4: FPGA Controller Card

The Baseboard4 is an FPGA based peripheral controller card that has a Xilinx FPGA, a USB interface, user accessible LEDs and buttons, and four expansion connectors for two daughter cards on each expansion connector.


- Xilinx 100K Spartan 3E
- USB download to the FPGA
- No JTAG dongles or drivers
- Full-speed USB interface
- USB powered
- Eight LEDs
- Three pushbuttons
- Three 3-pin GPIO headers
- Eight 8-pin cards slots (two slots per connector)




The Baseboard4 provides the logic and timing for up to nine different peripherals. A good introduction to this is on this web site's home page.



A schematic for the Baseboard4 is available here.

The Baseboard4 has at its core the XC3S100EVQ100, a 100K gate Xilinx Spartan-3E FPGA. The XC3S100EVQ100 has on-board hardware multipliers, and several flexible clock synthesizers. Much more information on this FPGA can be found on the Xilinx web site:

The Baseboard4 is powered by the USB connection and has onboard 3.3, 2.5, 1.8, and 1.2 volt regulators. The Baseboard4 does not require expensive and complex JTAG programming devices and drivers, and instead uses a simple USB serial port for download of all FPGA code. Since the USB transfer speed is over 8 Mbps, a download usually takes less than 50 milliseconds.

Also on board the Baseboard4 is an FT245RL, an FTDI USB interface. The FT245 has a USB serial interface on the host computer side and a parallel interface on the FPGA side. More information of the FT245RL is available at the FTDI web site:

FPGA Defined Peripherals
User Interface
FPGA Configuration
FPGA Buttons & LEDs
Host Tx/Rx Interface
AVR Interface
Stereo Audio Amplifier
Text LCD and Keypad
Quad WS2812 Interface
Quad Slide Pot
IR Recv/Xmit
6 Digit LCD
RC Decoder
Keyfob RF Decoder
Rotary Encoder Interface
Quad Touch Interface
Motion Control
Dual DC Motor Controller
Dual Quadrature Decoder
Quad 13 Bit Servo
Bipolar Stepper Controller
Unipolar Stepper Controller
Simple Input / Output
Quad Binary Output
Quad Binary Input
Octal Input/Output
32 Channel Binary Output
32 Channel Binary Input
Quad Serial Output
Octal Serial Output
Octal 12-bit ADC
Quad Ping))) Interface
Pololu QTR Interface
Octal SRF04 Interface
Generic I2C
Generic SPI
Octal 8-Bit DAC
Quad Digital Potentiometer
Quad PWM Output
Quad PWM Input
Quad Event Counter
Real Time Clock
Dual Pulse Generator

Interface Cards
Control Cards
User Interface
Stereo Audio Amplifier
IR Recv/xmit
Six Digit LCD Display
Keyfob RF Receiver
Rotary Encoder
Quad Switch Card
Text LCD / keypad
Quad Slide Pot
Quad Touch Interface
Motion Control
Dual 7-amp H-bridge
Quad Open Drain Driver
Quad 10 Amp Relay Card
Input / Output
Octal 8-Bit DAC
Quad Digital Potentiometer
Octal 12-bit ADC
Octal SRF04
I2C Prototyping
SPI Prototyping
USB 2.0 Hub
Real Time Clock
Octal Input/Output
32 Channel Input
32 Channel Output
Power Distribution Card
15 Amp Power Distribution
5 Volt Switching Regulator
ATX Power Break-Out Card
Disk Drive Power Break-Out
MP43 Aluminum Mounting Plate
WW4 Large Prototyping Card
WW2 Prototyping Card
WW1 Small Prototyping Card
SMP SMD Prototyping Card