XR16V794 Exar Corporation, XR16V794 Datasheet

XR16V794

Manufacturer Part Number

XR16V794

Description

HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART

Manufacturer

Exar Corporation

Datasheet

1.XR16V794.pdf (53 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

XR16V794IV-F

Manufacturer:

Quantity:

1 500

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BOSTOCK HK LIMITED

Part Number:

XR16V794IV-F

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Exar Corporation

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Part Number:

XR16V794IVTR-F

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Download datasheet (602Kb)

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MAY 2007

GENERAL DESCRIPTION

The XR16V794

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,

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.

APPLICATIONS

•

Exar

OTE

IGURE

Remote Access Servers

Ethernet Network to Serial Ports

Network Management

Factory Automation and Process Control

Point-of-Sale Systems

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

ENIR

16/68#

RST#

CS#

A7:A0

D7:D0

IOR#

IOW#

INT#

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

Corporation 48720 Kato Road, Fremont CA, 94538

1. B

LOCK

autoamtic

Motorola

Interface

Intel or

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

Data

Bus

IAGRAM

HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL

software

Configuration

Timer/Counter

(Xon/Xoff)

Device

16-bit

flow

•

(510) 668-7000

FEATURES

•

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

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:

Up to 8 Mbps Serial Data Rate

Pin compatible to XR16L784. Same 64-pin LQFP

Package (10x10x1.4 mm)

*All Inputs are 5V Tolerant

■

UART

Regs

BRG

(Except XTAL1)

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

RS485

Selectable Turn-around Delay

Infrared (IrDA 1.0) Data Encoder/Decoder

Programmable Data Rate with Prescaler

UART Channel 1

UART Channel 2

UART Channel 3

UART Channel 0

Crystal Osc/

•

TX &

FAX (510) 668-7017

64 Byte RX FIFO

Buffer

64 Byte TX FIFO

Half-Duplex

ENDEC

XR16V794

Control

DSR0#, RTS0#,

DSR3#, RTS3#,

TX0, RX0, DTR0#,

CTS0#, CD0#, RI0#

TX3, RX3, DTR3#,

CTS3#, CD3#, RI3#

XTAL1

XTAL2

TMRCK

•

www.exar.com

GND

2.25V to 3.6V VCC

Output

REV. 1.0.0

with

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