XR16M770 PDF даташит

Спецификация XR16M770 изготовлена «Exar Corporation» и имеет функцию, называемую «1.62V TO 3.63V HIGH PERFORMANCE UART».

Детали детали

Номер произв	XR16M770
Описание	1.62V TO 3.63V HIGH PERFORMANCE UART
Производители	Exar Corporation
логотип

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XR16M770

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

FEBRUARY 2009

REV. 1.0.0

GENERAL DESCRIPTION

The XR16M7701 (M770) is an enhanced Universal

Asynchronous Receiver and Transmitter (UART) with

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 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 mode with Auto Address detection

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.

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

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FEATURES

• 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

APPLICATIONS

• Personal Digital Assistants (PDA)

• Cellular Phones/Data Devices

• Battery-Operated Devices

• Global Positioning System (GPS)

• Bluetooth

FIGURE 1. XR16M770 BLOCK DIAGRAM

Pw rSave

A 2:A 0

D 7:D 0

IO R #

IO W #

CS#

IN T

RESET

In te l

D ata B us

In te rfa c e

UART

Regs

64 B yte TX FIFO

TX &

ENDEC

B R G 64 B yte R X FIFO

C rystal O sc/B uffer

VCC

(1.62 to 3.63 V )

GND

TX, RX,

RTS#, CTS#,

DTR#, DSR#,

R I#, C D #

XTAL1

XTAL2

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

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XR16M770

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

FIGURE 2. PIN OUT ASSIGNMENT FOR 24-PIN QFN, 32-PIN QFN AND 25-BGA PACKAGES

REV. 1.0.0

18 17 16 15 14 13

VCC 19

D0 20

D1 21

D2 22

24-pin QFN 10

D3 23

D4 24

123456

IOR#

GND

IOW#

CLK

PwrSave

24 23 22 21 20 19 18 17

DSR#

CD#

RI#

VCC

32-pin QFN

16 NC

15 NC

14 IOR #

13 GND

12 IOW #

11 XTAL 2

10 XTAL 1

9 NC

1 2 3 4 5 67 8

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A1 Corner

12 34 5

CTS#

VCC

Transparent Top View

RESET

DTR#

INT

RTS#

DSR#

CS#

IOR#

IOW#

XTAL1

GND

ORDERING INFORMATION

PART NUMBER

XR16M770IL24

XR16M770IL32

XR16M770IB25

PACKAGE

24-Pin QFN

32-Pin QFN

25-Pin BGA

OPERATING TEMPERATURE

RANGE

-40°C to +85°C

DEVICE STATUS

Active

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REV. 1.0.0

PIN DESCRIPTIONS

XR16M770

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

Pin Description

NAME

24-QFN

PIN#

32-QFN

PIN#

25-BGA

PIN#

TYPE

DESCRIPTION

DATA BUS INTERFACE

A2 12

A1 13

A0 14

D7 3

D6 2

D5 1

D4 24

D3 23

D2 22

D1 21

D0 20

IOR#

IOW# 9 12 C5

CS# 6 8 D4

INT 15 20 A3

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MODEM OR SERIAL I/O INTERFACE

TX 5 7 D3

RX 4 6 E4

RTS# 16 21 B3

CTS# 18 24 A1

DTR# - 22 B2

I Address lines [2:0]. These 3 address lines select the internal regis-

ters in UART during a data bus transaction.

I/O Data bus lines [7:0] (bidirectional).

I This input is read strobe (active low). The falling edge instigates an

internal read cycle and retrieves the data byte from an internal reg-

ister pointed by the address lines [A2:A0], puts the data byte on the

data bus to allow the host processor to read it on the rising edge.

I This input is write strobe (active low). The falling edge instigates the

internal write cycle and the rising edge transfers the data byte on

the data bus to an internal register pointed by the address lines.

I This input is chip select (active low) to enable the device.

(OD)

This output is the active high device interrupt output. The output

state is defined by the user through the software setting of MCR[3].

INT is set to the active mode when MCR[3] is set to a logic 1. INT is

set to the three state mode when MCR[3] is set to a logic 0. See

MCR[3].

O UART Transmit Data or infrared encoder data. Standard transmit

and receive interface is enabled when MCR[6] = 0. In this mode,

the TX signal will be a logic 1 during reset or idle (no data). Infrared

IrDA transmit and receive interface is enabled when MCR[6] = 1. In

the Infrared mode, the inactive state (no data) for the Infrared

encoder/decoder interface is a logic 0. If it is not used, leave it

unconnected.

I UART Receive Data or infrared receive data. Normal receive data

input must idle at logic 1 condition. The infrared receiver idles at

logic 0. This input should be connected to VCC when not used.

O UART Request-to-Send (active low) or general purpose output.

This output must be asserted prior to using auto RTS flow control,

see EFR[6], MCR[1] and IER[6].

I UART Clear-to-Send (active low) or general purpose input. It can

be used for auto CTS flow control, see EFR[7], MSR[4] and IER[7].

This input should be connected to VCC when not used.

O UART Data-Terminal-Ready (active low) or general purpose output.

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Номер в каталоге	Описание	Производители
XR16M770	1.62V TO 3.63V HIGH PERFORMANCE UART	Exar Corporation

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