Datasheet > 微控制器和处理器 > 串行 IO/通信控制器> XR16V2651

XR16V2651

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	1045K
描述
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE

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XR16V2651 数据手册

PRELIMINARY

HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE

XR16V2651

JUNE 2006

REV. P1.0.0

FEATURES

GENERAL DESCRIPTION

• 2.25 to 3.6 Volt Operation

• 5 Volt Tolerant Inputs

The XR16V2651 (V2651) is a high performance dual

universal asynchronous receiver and transmitter

(UART) with 32 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 and software compatible to

Exar’s XR16V2551 and XR16L2551. The device

• Pin-to-pin compatible to Exar’s XR16L2751 in the

48-TQFP package

• Two independent UART channels

■ Register set identical to 16V2650

includes

additional capabilities over the

XR16V2650: Intel and Motorola data bus selection

and a “PowerSave” mode to further reduce sleep

current to a minimum during sleep mode. It supports

the 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 V2651 is available in 48-

pin TQFP and 32-pin QFN packages.

■ 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 32 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. XR16V2651 BLOCK DIAGRAM

*5 Volt Tolerant Inputs

2.25 to 3.6V VCC

GND

PwrSave

A2:A0

D7:D0

UART Channel A

32 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#)

32 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XR16V2651相关器件

型号	品牌	获取价格	描述	数据表
XR16V2651_07	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE
XR16V2651IL32	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE
XR16V2651IL-F	EXAR	获取价格	Serial I/O Controller, 2 Channel(s), 2MBps, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, GREEN, QFN-32
XR16V2651IM	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE
XR16V2651IM-F	EXAR	获取价格	Serial I/O Controller, 2 Channel(s), 2MBps, CMOS, PQFP48, 7 X 7 MM, 1 MM HEIGHT, GREEN, TQ
XR16V2652	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO
XR16V2652_07	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO
XR16V2652IJ	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO
XR16V2652IJ-F	EXAR	获取价格	Serial I/O Controller, 2 Channel(s), 2MBps, CMOS, PQCC44, GREEN, PLASTIC, LCC-44
XR16V2652IL32	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO

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