Datasheet > XR20M1172

XR20M1172

更新时间： 2024-01-05 11:01:13

品牌	Logo	应用领域
艾科嘉 - EXAR		先进先出芯片
页数	文件大小	规格书
57页	1113K
描述
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO

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中文翻译

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数据手册

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XR20M1172 数据手册

XR20M1172

TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO

REV. 1.0.0

JUNE 2007

FEATURES

GENERAL DESCRIPTION

• 1.62 to 3.6 Volt Operation

• Selectable I²C/SPI Interface

The XR20M1172 (M1172) is a high performance two

channel universal asynchronous receiver and

transmitter (UART) with 64 byte TX and RX FIFOs

• Full-featured UART

and a selectable I²C/SPI slave interface. The M1172

operates from 1.62 to 3.63 volts. The standard

features include 16 selectable TX and RX FIFO

trigger levels, automatic hardware (RTS/CTS) and

software (Xon/Xoff) flow control, and a complete

modem interface. Onboard registers provide the user

with operational status and data error flags. An

■ Data rate of up to 16 Mbps at 3.3 V

■ Data rate of up to 12.5 Mbps at 2.5 V

■ Data rate of up to 8 Mbps at 1.8 V

■ Fractional Baud Rate Generator

■ Transmit and Receive FIFOs of 64 bytes

■ 16 Selectable TX and RX FIFO Trigger Levels

■ Automatic Hardware (RTS/CTS) Flow Control

■ Automatic Software (Xon/Xoff) Flow Control

■ Halt and Resume Transmission Control

internal

loopback

capability

allows

system

diagnostics. Additional enhanced features includes a

programmable fractional baud rate generator and 8X

and 4X sampling rate that allows for a maximum baud

rate of 16 Mbps at 3.3V. The M1172 is available in the

32-pin QFN and 28-pin TSSOP packages. The 32-

pin QFN package has the EN485# and ENIR# pins to

allow the UART to power-up in the Auto RS485 mode

or the Infrared mode.

■ Automatic RS-485 Half-duplex Direction

Control Output via RTS#

■ Wireless Infrared (IrDA 1.0 and 1.1) Encoder/

Decoder

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

■ Automatic sleep mode (< 30 uA at 3.3V)

■ General Purpose I/Os

APPLICATIONS

■ Full modem interface

• Portable Appliances

• Crystal oscillator (up to 24MHz) or external clock

(up to 64MHz) input

• Battery-Operated Devices

• Cellular Data Devices

• 32-QFN and 28-TSSOP packages

• Factory Automation and Process Controls

FIGURE 1. XR20M1172 BLOCK DIAGRAM

VCC

1.62 V – 3.63V

C hannel 1

TXA

RXA

64 Byte

TX FIFO

EN IR#

EN 485#

IRQ#

UART

Regs

RTSA#

CTSA#

64 Byte

RX FIFO

R ESET#

SDA

BRG

I²C/ SPI

Interface

SCK

A0/ CS#

A1/SI

[

]

G PIO 7:0

G PIO s

TXB

RXB

UART Channel 2

(Sim ilar to C hannel1)

RTSB#

CTSB#

C rystal

O sc /

Buffer

I2C/ SPI

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

12 3 4 5 6 7...57

中文翻译

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与XR20M1172相关器件

型号	品牌	获取价格	描述	数据表
XR20M1172_09	EXAR	获取价格	TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
XR20M1172G28-0A-EB	ETC	获取价格	EVAL BOARD FOR XR20M1172 28TSSOP
XR20M1172G28-0B-EB	ETC	获取价格	EVAL BOARD FOR XR20M1172 28TSSOP
XR20M1172IG28	EXAR	获取价格	TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
XR20M1172IG28-F	EXAR	获取价格	I2C Bus Controller, 2 Channel(s), 2MBps, CMOS, PDSO28, 4.40 MM, GREEN, TSSOP-28
XR20M1172IG28TR-F	EXAR	获取价格	I2C Bus Controller, CMOS, PDSO28, 4.40 MM, GREEN, TSSOP-28
XR20M1172IL32	EXAR	获取价格	TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
XR20M1172IL32-F	ETC	获取价格	IC UART FIFO I2C/SPI 64B 32QFN
XR20M1172IL32TR-F	EXAR	获取价格	I2C Bus Controller, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, GREEN, QFN-32
XR20M1172L32-0A-EB	ETC	获取价格	EVAL BOARD FOR XR20M1172 32QFN

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