User’s manual for the EXAR XR16M890 evaluation board, covering hardware setup and jumper settings for different device packages.
This manual provides instructions for setting up the EXAR XR16M890 evaluation board, which supports three different device packages: 32-pin QFN, 40-pin QFN, and 48-pin TQFP. It details jumper configurations for each package to select supply voltages, data routing, and RS-485 modes. The document also includes a sample initialization routine and technical support contact information.
The manual is intended for users configuring the board for testing or development purposes and includes warnings about product use in life support applications and patent infringement risks.
Jumper J20 selects 3.3V when placed in positions 1 and 2, 2.5V in positions 3 and 4, or 1.8V in positions 5 and 6.
Placing Jumper J34 in the 'in' position enables Auto RS-485 mode at power-up, while the 'out' position disables it.
The SLEEP/PWRDN pin header is installed with no jumpers installed, which is the default setting.