XR16M2551IM48-F

更新时间： 2024-11-07 13:16:11

品牌	Logo	应用领域
艾科嘉 - EXAR		微控制器和处理器串行IO控制器通信控制器外围集成电路先进先出芯片数据传输时钟
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51页	1191K
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XR16M2551IM48-F 数据手册

XR16M2551

HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

MAY 2007

REV. 1.0.2

FEATURES

GENERAL DESCRIPTION

• 1.62 to 3.63 Volt Operation

The XR16M2551 (M2551) is a high performance

dual universal asynchronous receiver and transmitter

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

operates from 1.62 to 3.63 volts and is pin-to-pin

compatible to the XR16L2551 and XR16V2551. The

M2551 includes 2 additional capabilities over the

XR16M2550: Intel and Motorola data bus selection

and a “PowerSave” mode to minimize the sleep

current. 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

• Pin-to-pin compatible to Exar’s XR16V2551 and the

XR16L2551

• Two independent UART channels

■ Register set is 16550 compatible

■ 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 1.8V

■ 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

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 M2551

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

packages.

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

APPLICATIONS

• PowerSave Feature reduces sleep current to 15 µA

• Device Identification and Revision

• Portable Appliances

• Telecommunication Network Routers

• Ethernet Network Routers

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

(up to 64MHz) input

• 48-TQFP and 32-QFN packages

• Cellular Data Devices

• Factory Automation and Process Controls

FIGURE 1. XR16M2551 BLOCK DIAGRAM

1.62 to 3.63V VCC

GND

PwrSave

A2:A0

D7:D0

UART Channel A

IOR# (VCC)

IOW# (R/W#)

CSA# (CS#)

TXA, RXA, DTRA#,

16 Byte TX FIFO

UART

Regs

DSRA#, RTSA#,

DTSA#, CDA#, RIA#,

OP2A#

TX & RX

ENDEC

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XR16M2551IM48-F相关器件

型号	品牌	获取价格	描述	数据表
XR16M2650	EXAR	获取价格	HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-BYTE FIFO
XR16M2650IL32	EXAR	获取价格	HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-BYTE FIFO
XR16M2650IM48	EXAR	获取价格	HIGH PERFORMANCE LOW VOLTAGE DUART WITH 32-BYTE FIFO
XR16M2651	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
XR16M2651IL32	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
XR16M2651IL32-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
XR16M2651IM48	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
XR16M2651IM48-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
XR16M2750	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
XR16M2750IL32	EXAR	获取价格	HIGH PERFORMANCE DUART WITH 64-BYTE FIFO

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