EXAR XR16M890IM48-0C-EB 评估模块, 用于XR16M892
The is an evaluation board for XR16M890 M890, a single channel universal asynchronous receiver and transmitter UART with integrated level shifters and 128bytes of transmit and receive FIFOs. For flexibility in a mixed voltage environment, the M890 has 4 VCC pins. There is a VCC pin for the core, a VCC pin for the UART signals, a VCC pin for the CPU interface signals and a VCC pin for the GPIO signals. The VCC pins for the UART, GPIO and CPU interface signals allow for the M890 to interface with devices operating at different voltage levels eliminating the need for external voltage level shifters. The auto RS 485 half duplex direction control feature simplifies both the hardware and software for half duplex RS 485 applications. In addition, the multidrop mode with auto address detection and address byte control features increase the performance by simplifying the software routines.