The XR16C2852*1 (2852) is a dual universal asynchronous receiver and transmitter (UART). The device is designed for high performance communication systems to provide maximum full-duplex data throughput. Each UART provides enhanced functions with 128 byte of transmit and receive FIFOs, automatic RTS/CTS and software flow control, programmable FIFO trigger level, automatic RS-485 half duplex transmit/receive direction control, wireless infrared (IrDA ver 1.0) data encoder/decoder, and a modem control interface. Onboard status registers provide the user with error indications and operational status. An alternate function register supports concurrent write to UART A and B. System interrupts and modem control features may be tailored by software to meet user requirements. Independent programmable baud rate generators are provided to select data rates up to 1.5 Mbps. An internal loopback capability allows onboard diagnostics. The 2852 is available in a 44-pin PLCC package and is pin-to-pin and functionally compatible with the ST16C2552. The device is fabricated in advanced CMOS process to achieve low power and high speed requirements.