XR17D154数据手册集成电路（IC）的UART（通用异步接收器发送器）规格书PDF

描述 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 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 HighlightsThe 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.For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

特性 Features

·Industry First Universal Board PCI Bus UART·Direct 3.3V and 5V PCI Bus Connection·PCI Bus Target revision 2.3 Signaling Compliant·32-bit Wide Data Read/Write Operation for Higher Data Throughput·Data Burst Operation for Faster Data Loading/Unloading·Global Interrupt Signal Register Increases Driver Efficiency·Each UART has 64-byte TX and RX FIFOs·Programmable TX and RX FIFO Trigger Level and FIFO Level Counters·Automatic RTS/CTS or DTR/DSR Hardware Flow Control·Automatic RS485 Direction Control Output with Selectable turn-around delay ·Up to 6.125 MBps Data Rate·Pb-Free, RoHS Compliant Versions Offered

应用 Application

·Universal PCI Bus Add-in Cards ·Multi Serial Port Solution ·Terminal Servers ·Point-of-Sale Systems ·Factory Automation Management ·Process Control Machinery ·Data Collection Servers ·Systems Monitoring and Management·Ethernet to Serial Ports