xr16m781il32 Exar Corporation, xr16m781il32 Datasheet

xr16m781il32

Manufacturer Part Number

xr16m781il32

Description

1.62v To 3.63v Uart With 64-byte Fifo And Vlio Interface

Manufacturer

Exar Corporation

Datasheet

1.XR16M781IL32.pdf (52 pages)

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FEBRUARY 2009

GENERAL DESCRIPTION

The XR16M781

Asynchronous Receiver and Transmitter (UART) with

a VLIO bus interface and has 64 bytes of transmit

and receive FIFOs, programmable transmit and

receive FIFO trigger levels, automatic hardware and

software flow control, and data rates of up to 20 Mbps

at 3.3V, 16 Mbps at 2.5V and 10 Mbps at 1.8V with

4X data sampling rate.

The Auto RS-485 Half-Duplex Direction control

feature simplifies both the hardware and software for

half-duplex RS-485 applications. In addition, the

Multidrop

increases the performance by simplifying the

software routines.

The Independent TX/RX Baud Rate Generator

feature allows the transmitter and receiver to operate

at different baud rates. Power consumption of the

M781 can be minmized by enabling the sleep mode

and PowerSave mode.

The M781 has a 16550 compatible register set that

provide users with operating status and control,

receiver error indications, and modem serial interface

controls. An internal loopback capability allows

onboard diagnostics. The M781 is available in 24-pin

QFN, 32-pin QFN and 25-pin BGA packages.

Exar

OTE

IGURE

Corporation 48720 Kato Road, Fremont CA, 94538

1 Covered by U.S. Patent #5,649,122.

1. XR16M781 B

AD7:AD0

Pw rSave

mode

RESET#

IOW #

LLA#

IOR#

CS#

INT

(M781) is an enhanced Universal

with

LOCK

Auto

1.62V TO 3.63V UART WITH 64-BYTE FIFO AND VLIO INTERFACE

VLIO Bus

Interface

IAGRAM

Address

detection

•

(510) 668-7000

UART

Regs

BRG

Crystal Osc/Buffer

FEATURES

•

APPLICATIONS

•

VLIO bus interface

Pin-to-pin

SC16C850SV in 32-QFN package

20 Mbps maximum data rate

Programmable TX/RX FIFO Trigger Levels

TX/RX FIFO Level Counters

Independent TX/RX Baud Rate Generator

Fractional Baud Rate Generator

Auto RTS/CTS Hardware Flow Control

Auto XON/XOFF Software Flow Control

Auto RS-485 Half-Duplex Direction Control

Multidrop mode w/ Auto Address Detect

Sleep Mode with Automatic Wake-up

PowerSave mode

Infrared (IrDA 1.0 and 1.1) mode

1.62V to 3.63V supply operation

Crystal oscillator or external clock input

Personal Digital Assistants (PDA)

Cellular Phones/Data Devices

Battery-Operated Devices

Global Positioning System (GPS)

Bluetooth

64 Byte TX FIFO

64 Byte RX FIFO

ENDEC

•

FAX (510) 668-7017

TX &

compatible

with

XR16M781

(1.62 to 3.63 V)

XTAL1

XTAL2

TX, RX,

RI#, CD#

RTS#, CTS#,

DTR#, DSR#,

•

VCC

GND

www.exar.com

SC16C850V

REV. 1.0.0

and

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