U 903

• I²C / SPI Serial Communication Control Box

• The U 903 connects to a computer via a USB interface and provides I²C, SPI, and GPIO interfaces, making it suitable for device data reading and writing, interface debugging, and test system integration.

  The I²C interface communicates with target devices through the SCL clock line and SDA data line; the SPI interface leads out the clock, chip select, and four data signals. The communication mode and rate are set according to the product configuration and accompanying software.

  The I²C / SPI interfaces share a switchable VOUT power supply, with a nominal design of 1.8 V / 3.3 V; two 3.3 V GPIO signals are also provided.