5V PCI BUS DUAL UART - Exar Corporation
Description
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JUNE 2004
XR17C152
5V PCI BUS DUAL UART
REV.
1.
2.
0
GENERAL DESCRIPTION
The XR17C1521 (152) is a monolithic dual PCI Bus Universal Asynchronous Receiver and Transmitter (UART) in Exar’s PCI Bus UART family.
The device is designed to meet today’s 32-bit PCI Bus and high bandwidth requirement in communication systems.
The global interrupt source register provides a complete interrupt status indication for both channels to speed up interrupt parsing.
Each UART is independently controlled and has its own 16C550 compatible 5G (Fifth Generation) register set, transmit and receive FIFOs of 64 bytes, fully programmable transmit and receive FIFO trigger levels, transmit and receive FIFO level counters, automatic hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, automatic half-duplex control output, wireless IrDA (Infrared Data Association) infrared 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, #5,949,787
FEATURES • High Performance Dual PCI UART • PCI Bus 2.
2 Target Interface Compliance • 5V PCI Bus Compliant up to 33MHz Clock • 32-bit PCI Bus Interface with EEPROM Interface • A Global Interrupt Source Register for both UARTs • Data Transfer in Byte, Word and Double-word • Data Read/Write Burst Operation • Each UART is independently controlled with: •16C550 Compatible 5G Register Set •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 •Automatic RS485 Half-duplex Control Output with 16 Selectable Turn-around Delay •Infrared (IrDA 1.
0) Data Encoder/Decoder •Programmable Data Rate with Prescaler •Up to 6.
25 Mbps Serial Data Rate at 5V and 8X Sampling • Eight Multi-Purpose Inputs/outputs • A General Purpose 16-bit Timer/Counter • Sleep Mode with Automatic Wake-up Indicator • Same package and pinout...
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