17C158CV

xr www.DataSheet4U.com AUGUST 2005 XR17C158 5V PCI BUS OCTAL UART REV. 1.4.3 GENERAL DESCRIPTION The XR17C1581 (158) is an octal Universal Asynchronous Receiver and Transmitter (UART). The device is designed to meet the 32-bit PCI Bus and high bandwidth requirement in communication systems. The global interrupt source register provides a complete interrupt status indication for all 8 channels to speed up interrupt parsing. Each UART has its own 16C550 compatible set of configuration registers, transmit and receive FIFOs of 64 bytes, fully programmable transmit and receive FIFO level triggers, transmit and receive FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, IrDA (Infrared Data Association) encoder/decoder, 8 multi-purpose definable inputs/outputs, and a 16-bit general purpose timer/counter. NOTE: 1 Covered by U.S. Patents #5,649,122 and #5,949,787 FEATURES High Performance Octal UART 32-bit PCI Bus Interface with EEPROM Interface Interrupt Source Register for all 8 UARTs Data Transfer in Byte, Word and Double-word Read/Write Burst Operation Each UART Includes 16C550 Compatible Registers 64-byte Transmit and Receive FIFOs Transmit and Receive FIFO Level Counters Automatic RTS/CTS or DTR/DSR Flow Control Automatic Xon/Xoff Software Flow Control RS485 Half-duplex Control with Selectable Delay Infrared (IrDA 1.0) Data Encoder/Decoder Programmable Dat...