GENERAL DESCRIPTION

The XR16C850*1 (850) is a universal asynchronous receiver and transmitter (UART) and is pin compatible with the ST16C550,ST16C650A, and TI’s TL16C750 UART. The 850 is an enhanced UART with 128 byte FIFOs, automatic hardware/software flow control, and data rates up to 1.5Mbps. It includes transmit/receive FIFO counters to increase data loading and unloading throughput. Onboard status registers provide error indications and operational status. Modem interface control is included and can be optionally configured to operate with the Infrared (IrDA) encoder/decoder. Internal loopback allows onboard diagnostics.

FEATURES

• Pin to pin compatible to ST16C550, ST16C650A and TL16C750

• Transmit/receive FIFO counters

• 128 bytes of Transmit/Receive FIFO

• RS-485 half duplex direction control

• Automatic software/hardware flow control

• Programmable, selectable transmit/receive trigger levels

• Infrared transmitter and receiver encoder/decoder

• Up to 1.5Mbps data rate

• Sleep mode (100µA standby)

• Small 7x7mm TQFP

• +5 or 3.3 Volts operation

• Windows² drivers available