XR17D158

Features:

•High Performance Octal PCI UART
•Universal PCI Bus Buffers - Auto-sense 3.3V or 5V Operation
•32-bit PCI Bus 2.3 Target Signalling Compliance
•A Global Interrupt Source Register for all 8 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
Programmable TX and RX FIFO Trigger Level
Automatic RTS/CTS or DTR/DSR Flow Control
Automatic Xon/Xoff Software Flow Control
RS485 HDX Control Output with Selectable Turn-around Delay
Infrared (IrDA 1.0) Data Encoder/Decoder
Programmable Data Rate with Prescaler
Up to 6.25 Mbps Serial Data Rate
•Eight Multi-Purpose Inputs/outputs
•A General Purpose 16-bit Timer/counter
•Sleep Mode with Automatic Wake-up
•EEPROM Interface for PCI Configuration




Application

•Universal Form Factor PCI Bus Add-in Card
•Remote Access Servers
•Network Management
•Factory Automation and Process Control
•Point-of-Sale Systems
•Multi-port RS-232/RS-422/RS-485 Cards




Pinout






Specifications

Specifications
CH	8
CPUInterface	PCI Bus (2.2)
Data Rate@5/3.3/2.5V	6.2/na/na @8X
Tx/RxFIFO(Bytes)	64/64
Tx/RxFIFOCtrs	Yes
Tx/RxFIFOINT Trig	Program/ Program
AutoRTS/CTS	Yes
IrDaSup	Yes
AutoRS-485	Yes
5VTolInputs	Yes
Sup V	3.3, 5
Pkgs	LQFP-144

Power Supply Range 7 Volts
Voltage at Any Pin -0.5 to 7V
Operating Temperature -40o to +85
Storage Temperature -65o to +150
Package Dissipation 500 mW
Thermal Resistance (20x20x1.4mm 144-TQFP) theta-ja = 42, theta-jc = 8




Description



The XR17D152 (dual) and XR17D154 (quad) and XR17D158 (octal) are industry first UARTs to support both 3.3V and 5V Universal PCI Bus signaling designs. A PCI Bus add-in card designed using one of the Universal PCI UART means the card will operate virtually in any PC system, old with 5V and new at 3.3V. PC Add-in card manufacturers can simply build and ship the Universal PCI cards to the distribution channel or customers without having to concern with slot's VIO voltage compatibility.

This XR17D158 multi-channel Universal PCI UART product family is highly integrated and well suited for Universal PCI add-in card solutions. In addition, they support high bandwidth requirements found in communication devices of Point-of-Sale (POS) systems, industrial machineries, computer servers and telecom network management solutions for systems based on PCI Bus, CompactPCI, PMC, VME and PC/104Plus industry standards. These Universal PCI UART devices build on the earlier successful introduction of the 5V devices (XR17C152/154/158, 2/4/8 channels), and 3.3V (XR17L152/154) and will deliver the same product innovations that have been a hallmark of Exar's offerings including: minimized design cycles, increased performance, and acceleration of time-to-market.

Product Highlights

The XR17D158 new series complies with Universal PCI Bus signaling to support designs for old at 5V and new at 3.3V PCI systems. The three devices meet and support the Universal PCI Bus Target signaling speed of up to 33MHz at 3.3V and 5V. The devices support auto-configuration registers for plug-and-play installation. Their 32-bit global interrupt source register offers an at-a-glance status that is capable of identifying which UART channel's transmitter or receiver has requested service. This feature greatly facilitates interrupt parsing and increases service efficiency, hence, eliminates the conventional approach of individually polling each channel. The Universal PCI UART series is capable of operating 4 times faster in data transfer efficiency by its 32-bit data loading and unloading capability than the traditional ISA (8-bit) bus.

In addition, automatic RS-485 direction control with selectable turn-around delay is provided enabling faster polling in 2-wire half-duplex networks. Automatic hardware (RTS/CTS or DTR/DSR) and software flow (Xon/Xoff) control facility is supported to prevent data loss and packet retransmission, hence, increasing throughput.

The 5G register set is compatible to the industry's standard 16C550, providing easy software migration from existing driver codes. Additionally, they support programmable TX and RX FIFO interrupt trigger levels and FIFO level counters to optimize interrupt intervals.

A Universal PCI Bus demonstration add-in card is available now for purchase with schematics and Windows(TM) 2000/NT/XP device driver for evaluation. Furthermore, a Linux device driver is also available now.

Windows is a trademark of Microsoft Corporation.

The XR17D158¹ (D158) is an octal PCI Bus Universal Asynchronous Receiver and Transmitter (UART) with support for PCI Bus universal VIO buffers in the same package and pin-out as the XR17C158, XR17C154 and XR17D154. The device is designed to meet the 32-bit PCI Bus and high bandwidth requirement in communication systems. A 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 trigger levels, transmit and receive FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis levels, automatic software (Xon/Xoff) flow control, IrDA (Infrared Data Association) encoder/decoder, 8 multi-purpose inputs/outputs and a 16-bit general purpose timer/counter.
NOTE: 1 Covered by U.S. Patents #5,649,122 and #5,949,787