Datasheet > XR-1790

XR-1790

更新时间： 2024-11-22 23:34:07

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
58页	638K
描述
Audio Schematic

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中文翻译

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数据手册

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XR-1790 数据手册

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XR17L154

3.3V PCI BUS QUAD UART

OCTOBER 2002

REV. 1.0.0

FEATURES

GENERAL DESCRIPTION

• High Performance Quad UART

The XR17L154¹(L154) is a quad PCI Bus Universal

Asynchronous Receiver and Transmitter (UART) with

same package and pin-out as the Exar XR17C158

octal UART. The device is designed to meet today’s

32-bit PCI Bus and high bandwidth requirement in

communication systems. The global interrupt source

• PCI Bus 2.2 Target Interface Compliance

• 3.3 Volt PCI Bus Compliant up to 33 MHz Clock

• 5 Volt Tolerant Serial Inputs

• 32-bit PCI Bus Interface with EEPROM Interface

• A Global Interrupt Source Register for all 4 UARTs

• Data Transfer in Byte, Word and Double-word

• Data Read/Write Burst Operation

complete interrupt status

indication for all 4 channels to speed up interrupt

parsing. Each UART is independently controlled and

has its own 16C550 compatible 5G 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, IrDA (Infrared Data Association) encoder/

decoder, 8 multi-purpose definable inputs/outputs,

and a 16-bit general purpose timer/counter.

• Each UART is independently Controlled with:

•16C550 Compatible 5G (Fifth Gen) 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

NOTE: 1 Covered by U.S. Patents #5,649,122, #5,832,205

•Automatic RS485 Half-duplex Control Output with

Selectable Turn-around Delay (0 to 15 bit-times)

•Infrared (IrDA 1.0) Data Encoder/Decoder

APPLICATIONS

• Remote Access Servers

• Ethernet Network to Serial Ports

• Network Management

•Programmable Data Rate with Prescaler

•Up to 4 Mbps Serial Data Rate at 8X

• Eight Multi-Purpose Inputs/outputs

• General Purpose 16-bit Timer/Counter

• Sleep Mode with Automatic Wake-up

• Factory Automation and Process Control

• Point-of-Sale Systems

• Multi-port RS-232/RS-422/RS-485 Cards

• Same Package and Pin-out as XR17C158 and

XR17C154 UARTs (20x20x1.4mm 144-TQFP)

FIGURE 1. BLOCK DIAGRAM

3.3V VCC

GND

*5V Tolerance for non-PCI Inputs

UART Channel 0

CLK (33MHz)

RST#

AD[31:0]

C/BE[3:0]#

FRAME#

IRDY#

64 Byte TX FIFO

UART

TX0, RX0, DTR0#,

DSR0#, RTS0#,

CTS0#, CD0#, RI0#

Regs

ENDEC

& RX

PCI Local

Bus

Interface

TRDY#

BRG

64 Byte RX FIFO

Device

Configuration

Registers

DEVSEL#

STOP#

INTA#

UART Channel 1

UART Channel 2

UART Channel 3

IDSEL

PERR#

SERR#

PAR

Configuration

Space

Registers

TX3, RX3, DTR3#,

DSR3#, RTS3#,

CTS3#, CD3#, RI3#

16-bit

Timer/Counter

Multi-purpose

EECK

EEDI

MPIO0- MPIO7

EEPROM

Interface

Inputs/Outputs

EEDO

EECS

XTAL1

XTAL2

Crystal Osc/Buffer

ENIR

TMRCK

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

12 3 4 5 6 7...58

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与XR-1790相关器件

型号	品牌	获取价格	描述	数据表
XR17C152	EXAR	获取价格	5V PCI BUS DUAL UART
XR17C152CM	EXAR	获取价格	5V PCI BUS DUAL UART
XR17C152IM	EXAR	获取价格	5V PCI BUS DUAL UART
XR17C154	EXAR	获取价格	5V PCI BUS QUAD UART
XR17C154_05	EXAR	获取价格	5V PCI BUS QUAD UART
XR17C154CV	EXAR	获取价格	5V PCI BUS QUAD UART
XR17C154IV	EXAR	获取价格	5V PCI BUS QUAD UART
XR17C158	EXAR	获取价格	5V PCI BUS OCTAL UART
XR17C158CV	EXAR	获取价格	5V PCI BUS OCTAL UART
XR17C158CV-F	EXAR	获取价格	Serial I/O Controller, 8 Channel(s), 0.78125MBps, CMOS, PQFP144, 20 X 20 MM, 1.40 MM HEIGH

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