Datasheet > 微控制器和处理器 > 串行 IO/通信控制器> XR16V2551

XR16V2551

更新时间： 2024-11-22 04:23:31

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
51页	1049K
描述
HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

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XR16V2551 数据手册

PRELIMINARY

XR16V2551

HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

JUNE 2006

REV. P1.0.0

FEATURES

GENERAL DESCRIPTION

• 2.25 to 3.6 Volt Operation

• 5 Volt Tolerant Inputs

The XR16V2551 (V2551) is a high performance dual

universal asynchronous receiver and transmitter

(UART) with 16 byte TX and RX FIFOs. The device

operates from 2.25 to 3.6 volts with 5 Volt tolerant

inputs and is pin-to-pin compatible to Exar’s

XR16V2651 and XR16L2551. The device includes 2

additional capabilities over the XR16V2550: Intel and

Motorola data bus selection and a “PowerSave”

mode to further reduce sleep current to a minimum

during sleep mode. It supports Exar’s enhanced

features of selectable FIFO trigger level, automatic

hardware (RTS/CTS) and software flow control, and a

complete modem interface. An internal loopback

capability allows system diagnostics. Independent

programmable fractional baud rate generators are

provided in each channel to select data rates up to 16

Mbps at 3.3 Volt and 4X sampling clock. The V2551

is available in 48-pin TQFP and 32-pin QFN

packages.

• Pin-to-pin compatible to Exar’s XR16V2651 and the

XR16L2551

• Two independent UART channels

■ Register set identical to 16V2550

■ Data rate of up to 16 Mbps at 3.3 V, and 12.5

Mbps at 2.5 V with 4X sampling rate

■ Fractional Baud Rate Generator

■ Transmit and Receive FIFOs of 16 bytes

■ Selectable TX and RX FIFO Trigger Levels

■ Automatic Hardware (RTS/CTS) Flow Control

■ Automatic Software (Xon/Xoff) Flow Control

■ Wireless Infrared (IrDA 1.0) Encoder/Decoder

■ Automatic sleep mode with wake-up interrupt

■ Full modem interface

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

• PowerSave Feature reduces sleep current to 15 µA

• Device Identification and Revision

APPLICATIONS

• Portable Appliances

• Crystal oscillator (up to 32MHz) or external clock

(up to 64MHz) input

• Telecommunication Network Routers

• Ethernet Network Routers

• 48-TQFP and 32-QFN packages

• Cellular Data Devices

• Factory Automation and Process Controls

FIGURE 1. XR16V2551 BLOCK DIAGRAM

*5 Volt Tolerant Inputs

2.25 to 3.6V VCC

GND

PwrSave

A2:A0

D7:D0

UART Channel A

16 Byte TX FIFO

IOR# (VCC)

IOW# (R/W#)

CSA# (CS#)

TXA, RXA, DTRA#,

DSRA#, RTSA#,

DTSA#, CDA#, RIA#,

OP2A#

UART

Regs

ENDEC

TX & RX

CSB# (A3)

BRG

INTA (IRQ#)

16 Byte RX FIFO

INTB (logic 0)

TXB, RXB, DTRB#,

DSRB#, RTSB#,

CTSB#, CDB#, RIB#,

OP2B#

TXRDYA#

TXRDYB#

RXRDYA#

RXRDYB#

UART Channel B

(same as Channel A)

Intel or

Motorola

Data Bus

Interface

XTAL1

XTAL2

Reset (Reset#)

16/68#

Crystal Osc/Buffer

CLKSEL

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

12 3 4 5 6 7...51

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与XR16V2551相关器件

型号	品牌	获取价格	描述	数据表
XR16V2551_07	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE
XR16V2551IL32	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE
XR16V2551IM	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE
XR16V2551IM-F	EXAR	获取价格	暂无描述
XR16V2551IMTR-F	EXAR	获取价格	暂无描述
XR16V2552	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
XR16V2552_07	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
XR16V2552IJ	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
XR16V2552IJ-F	EXAR	获取价格	Serial I/O Controller, 2 Channel(s), 2MBps, CMOS, PQCC44, GREEN, PLASTIC, LCC-44
XR16V2552IJTR-F	EXAR	获取价格	Serial I/O Controller, CMOS, PQCC44

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