XR16M770 Exar Corporation, XR16M770 Datasheet

XR16M770

Manufacturer Part Number

XR16M770

Description

1.62V TO 3.63V HIGH PERFORMANCE UART

Manufacturer

Exar Corporation

Datasheet

1.XR16M770.pdf (52 pages)

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FEBRUARY 2009

GENERAL DESCRIPTION

The XR16M770

Asynchronous Receiver and Transmitter (UART) with

programmable transmit and receive FIFO trigger

levels, automatic hardware and software flow control,

and data rates of up to 16 Mbps at 3.3V, 12.5 Mbps at

2.5V and 7.5 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

M770 can be minimized by enabling the sleep mode

and PowerSave mode.

The M770 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 M770 is available in 24-pin

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

three packages offer the 16 mode (Intel bus) interface

only.

Exar

OTE

IGURE

bytes

Corporation 48720 Kato Road, Fremont CA, 94538

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

1. XR16M770 B

P w r S a v e

mode

D 7 :D 0

A 2 :A 0

R E S E T

IO W #

IO R #

C S #

IN T

(M770) is an enhanced Universal

transmit

with

LOCK

Auto

1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO

and

D a ta B u s

In te rfa c e

In te l

IAGRAM

Address

receive

detection

FIFOs,

•

(510) 668-7000

U A R T

R e g s

B R G

C ry s ta l O s c /B u ffe r

FEATURES

•

APPLICATIONS

•

Pin-to-pin compatible with XR16L570 in 24-QFN

and 32-QFN packages

Intel data bus Interface

16 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 in 24-pin QFN package

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

6 4 B y te R X F IF O

6 4 B y te T X F IF O

T X &

R X

U A R T

•

E N D E C

FAX (510) 668-7017

XR16M770

(1 .6 2 to 3 .6 3 V )

X T A L 1

X T A L 2

T X , R X ,

R I# , C D #

•

R T S # , C T S # ,

D T R # , D S R # ,

V C C

www.exar.com

G N D

REV. 1.0.0

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