Datasheet > XR16V794_08

XR16V794_08

更新时间： 2024-11-23 06:01:59

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
53页	1180K
描述
HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL

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XR16V794_08 数据手册

XR16V794

HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL

JULY 2008

REV. 1.0.1

FEATURES

GENERAL DESCRIPTION

• 2.25V to 3.6V with 5V Tolerant Serial Inputs

• Single Interrupt output for all 4 UARTs

• A Global Interrupt Source Register for all 4 UARTs

• 5G “Flat” UART Registers for easier programming

• Simultaneous Initialization of all UART channels

The XR16V794 (794), is a 2.25V to 3.6V octal

Universal Asynchronous Receiver and Transmitter

(UART) with 5V tolerant serial (modem) inputs. The

highly integrated device is designed for high

bandwidth requirement in communication systems.

The global interrupt source register provides a

complete interrupt status indication for all 4 channels

to speed up interrupt parsing. Each UART has its own

16C550 compatible set of configuration registers, TX

and RX FIFOs of 64 bytes, fully programmable

transmit and receive FIFO trigger levels, TX and RX

FIFO level counters, automatic RTS/CTS or DTR/

DSR hardware flow control with programmable

hysteresis, autoamtic software (Xon/Xoff) flow

control, RS-485 half-duplex direction control with

programmable turn-around delay, Intel or Motorola

bus interface and sleep mode with a wake-up

indicator.

• A General Purpose Command-driven 16-bit

Timer/counter

• Sleep Mode with Wake-up Indication

• Highly Integrated Device for Space Saving

• Each UART is independently controlled with:

■ 16C550 Compatible 5G Register Set

■ 64-byte Transmit and Receive FIFOs

■ Fractional Baud Rate Generator

■ 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

NOTE: Covered by US patents #5,649,122 and #5,949,787

APPLICATIONS

■ RS485 Half-Duplex Control Output with

• Remote Access Servers

Selectable Turn-around Delay

• Ethernet Network to Serial Ports

• Network Management

• Factory Automation and Process Control

• Point-of-Sale Systems

■ Infrared (IrDA 1.0) Data Encoder/Decoder

■ Programmable Data Rate with Prescaler

• Up to 8 Mbps Serial Data Rate

• Pin compatible to XR16L784. Same 64-pin LQFP

Package (10x10x1.4 mm)

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

FIGURE 1. BLOCK DIAGRAM

2.25V to 3.6V VCC

GND

*All Inputs are 5V Tolerant

(Except XTAL1)

UART Channel 0

64 Byte TX FIFO

UART

TX0, RX0, DTR0#,

DSR0#, RTS0#,

CTS0#, CD0#, RI0#

A7:A0

Regs

TX &

ENDEC

D7:D0

BRG

Device

64 Byte RX FIFO

IOR#

Configuration

Intel or

Motorola

Data

Bus

Interface

IOW#

CS#

UART Channel 1

UART Channel 2

UART Channel 3

INT#

16/68#

RST#

ENIR

TX3, RX3, DTR3#,

DSR3#, RTS3#,

CTS3#, CD3#, RI3#

16-bit

Timer/Counter

Crystal Osc/

Buffer

XTAL1

XTAL2

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...53

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与XR16V794_08相关器件

型号	品牌	获取价格	描述	数据表
XR16V794IV	EXAR	获取价格	HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL
XR16V794IV-F	EXAR	获取价格	Serial I/O Controller, 8 Channel(s), 1MBps, CMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, GREE
XR16V798	EXAR	获取价格	HIGH PERFORMANCE 2.25V TO 3.6V OCTAL UART WITH FRACTIONAL BAUD RATE
XR16V798_08	EXAR	获取价格	HIGH PERFORMANCE 2.25V TO 3.6V OCTAL UART WITH FRACTIONAL
XR16V798IQ	EXAR	获取价格	HIGH PERFORMANCE 2.25V TO 3.6V OCTAL UART WITH FRACTIONAL BAUD RATE
XR16V798IQ-F	EXAR	获取价格	Serial I/O Controller, PQFP100
XR-1790	ETC	获取价格	Audio Schematic
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

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