Datasheet > 微控制器和处理器 > 串行 IO/通信控制器> XR16L651IM

XR16L651IM

更新时间： 2024-11-07 04:23:31

品牌	Logo	应用领域
艾科嘉 - EXAR		先进先出芯片
页数	文件大小	规格书
56页	635K
描述
2.25V TO 5.5V UART WITH 32-BYTE FIFO

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XR16L651IM 数据手册

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XR16L651

2.25V TO 5.5V UART WITH 32-BYTE FIFO

REV. 1.3.0

JANUARY 2004

FEATURES

GENERAL DESCRIPTION

Added feature in devices with top mark date code of

"C2 YYWW" and newer:

The XR16L651¹(651) is a 2.25 to 5.5 volt Universal

Asynchronous Receiver and Transmitter (UART) with

5 volt tolerant inputs. This device supports Intel and

Motorola data bus interfaces and is software

compatible to industry standard 16C450, 16C550,

ST16C580 and ST16C650A UARTs.

■ 0 ns address hold time

• 2.25 to 5.5 Volt Operation w/ 5 Volt Tolerant Inputs

• ST16C450/550/580/650A Software Compatible

• Intel, Motorola or PC Mode 8-bit Bus Interface

• Up to 3.125 Mbps Data Rate at 5 Volt Operation

• 32-byte Transmit and Receive FIFOs

The 651 has 32 bytes of TX and RX FIFOs and is

capable of operating up to serial data rates of 3.125

Mbps at 5 volt supply voltage. The internal registers

include the 16C550 register set plus Exar’s enhanced

registers for additional features to support today’s

highly demanding data communication needs. The

enhanced features include automatic hardware and

software flow control, selectable TX and RX trigger

levels, and wireless infrared (IrDA) encoder/decoder.

• Automatic RS485 Half-Duplex Control Output

• Automatic Hardware (RTS/CTS) Flow Control

• Hardware Flow Control Hysteresis

• Automatic Software (Xon/Xoff) Flow Control

• Infrared (IrDA) Encoder/Decoder Enable Input

• Programmable Infrared Encoder Pulse Width

• Sleep Mode with Wake-up Indicator via interrupt

The device provides a new capability to give user the

ability to program the wireless infrared encoder

output pulse width, hence reducing the power

consumption of a handheld unit.

APPLICATIONS

The XR16L651 device comes in a small 7x7x1mm

48-pin TQFP package in both the commercial and

industrial temperature ranges.

• Battery Operated Electronics

• Internet Appliances

NOTE: 1 Covered by US patents #5,649,122.

• Handheld Terminal

• Personal Digital Assistants

• Cellular Phones DataPort

• Wireless Infrared Data Communications Systems

FIGURE 1. BLOCK DIAGRAM

RESET

A2:A0

32 Byte TX FIFO

Transmitter

D7:D0

Infrared Encoder and

Pulse Width Control

IOR#

IOR

IOW#/R/W#

Intel,

CTS Flow

Control

UART

Configuration

Regs

IOW

Motorola

or PC

Data Bus

Interface

DTR#, DSR#,

RTS#, CTS#,

CD#, RI#

CS2#

CS1

CS0

Modem Control Signals

RTS Flow

Control

Infrared

Decoder

INT

TXRDY#

Receiver with Auto

Software Flow Control

RDRDY#

DDIS#

ENIR

32 Byte RX FIFO

BRG

Prescaler

IM#

PCMODE#

Baud Rate Generator

Crystal Osc/Buffer

IRQA

IRQB

IRQC

PC Mode:

COM 1 to 4

Decode Logic

XTAL1/CLK

XTAL2

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

12 3 4 5 6 7...56

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与XR16L651IM相关器件

型号	品牌	获取价格	描述	数据表
XR16L651IM-F	EXAR	获取价格	Serial I/O Controller, 1 Channel(s), 0.390625MBps, CMOS, PQFP48, 7 X 7 MM, 1 MM HEIGHT, GR
XR16L758CQ	EXAR	获取价格	Serial I/O Controller, 8 Channel(s), 0.78125MBps, CMOS, PQFP100, 14 X 20 MM, 3 MM HEIGHT,
XR16L758IQ	EXAR	获取价格	Serial I/O Controller, 8 Channel(s), 0.78125MBps, CMOS, PQFP100, 14 X 20 MM, 3 MM HEIGHT,
XR16L784	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
XR16L784_05	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
XR16L784_08	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
XR16L78464-TQFP	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
XR16L784CV	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
XR16L784CV-F	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
XR16L784IV	EXAR	获取价格	HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART

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