Datasheet > 微控制器和处理器 > 串行 IO/通信控制器> XR16C854D

XR16C854D

更新时间： 2024-09-16 21:54:55

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
54页	649K
描述
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

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XR16C854D 数据手册

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XR16C854/854D

2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

JANUARY 2004

REV. 3.0

FEATURES

GENERAL DESCRIPTION

Added feature in devices with top mark date code of

"F2 YYWW" and newer:

The XR16C854/854D¹(854) is an enhanced quad

Universal Asynchronous Receiver and Transmitter

(UART) each with 128 bytes of transmit and receive

FIFOs, transmit and receive FIFO counters and

trigger levels, automatic hardware and software flow

control, and data rates of up to 2 Mbps. Each UART

has a set of registers that provide the user with

operating status and control, receiver error

indications, and modem serial interface controls.

System interrupts may be tailored to meet design

requirements. An internal loopback capability allows

onboard diagnostics. The 854 is available in 64-pin

TQFP, 68-pin PLCC and 100-pin QFP packages.

The 64-pin package only offers the 16 mode

interface, but the 68 and 100 pin packages offer an

additional 68 mode interface which allows easy

■ 5 volt tolerant inputs

• 2.97 to 5.5 Volt Operation

• Pin-to-pin compatible with the industry standard

ST16C554 and ST16C654 and TI’s TL16C554N

and TL16C754BFN

• Intel or Motorola Data Bus Interface select

• Four independent UART channels

■ Register Set Compatible to 16C550

■ Data rates of up to 2 Mbps

■ Transmit and Receive FIFOs of 128 bytes

■ Programmable TX and RX FIFO Trigger Levels

■ Transmit and Receive FIFO Level Counters

■ Automatic Hardware (RTS/CTS) Flow Control

■ Selectable Auto RTS Flow Control Hysteresis

■ Automatic Software (Xon/Xoff) Flow Control

■ Wireless Infrared (IrDA 1.0) Encoder/Decoder

• Sleep Mode (200 uA typical)

integration with Motorola processors.

The

XR16C854CV (64 pin) offers three state interrupt

outputs while the XR16C854DV provides continuous

interrupt outputs. The 100 pin package provides

additional FIFO status outputs (TXRDY# and

RXRDY# A-D), separate infrared transmit data

outputs (IRTX A-D) and channel C external clock

input (CHCCLK). The XR16C854/854D is compatible

with the industry standard ST16C554/554D and

ST16C654/654D.

• Crystal oscillator or external clock input

APPLICATIONS

• Portable Appliances

NOTE: 1 Covered by U.S. Patent #5,649,122 and #5,949,787.

• Telecommunication Network Routers

• Ethernet Network Routers

• Cellular Data Devices

• Factory Automation and Process Controls

FIGURE 1. XR16C854 BLOCK DIAGRAM

2.97V to 5.5V VCC

GND

A2:A0

D7:D0

UART Channel A

128 Byte TX FIFO

IOR#

IOW#

UART

TXA, RXA, IRTXA, DTRA#,

DSRA#, RTSA#, CTSA#,

CDA#, RIA#, OP2A#

Regs

ENDEC

TX & RX

CSA#

CSB#

CSC#

CSD#

BRG

128 Byte RX FIFO

TXB, RXB, IRTXB, DTRB#,

DSRB#, RTSB#, CTSB#,

CDB#, RIB#, OP2B#

UART Channel B

(same as Channel A)

INTA

INTB

INTC

Data Bus

Interface

TXC, RXC, IRTXC, DTRC#,

DSRC#, RTSC#, CTSC#,

CDC#, RIC#, OP2C#

UART Channel C

(same as Channel A)

INTD

CHCCLK

TXRDY# A-D

RXRDY# A-D

TXD, RXD, IRTXD, DTRD#,

DSRD#, RTSD#, CTSD#,

CDD#, RID#, OP2D#

UART Channel D

(same as Channel A)

Reset

16/68#

INTSEL

XTAL1

XTAL2

Crystal Osc/Buffer

854 BLK

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

12 3 4 5 6 7...54

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与XR16C854D相关器件

型号	品牌	获取价格	描述	数据表
XR16C854DCV	EXAR	获取价格	QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854DCV-F	EXAR	获取价格	Serial I/O Controller, 4 Channel(s), 0.25MBps, CMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, G
XR16C854DCVTR-F	EXAR	获取价格	Serial I/O Controller, CMOS,
XR16C854DIV	EXAR	获取价格	QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854IJ	EXAR	获取价格	QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854IJ-F	EXAR	获取价格	Serial I/O Controller, 4 Channel(s), 0.25MBps, CMOS, PQCC68, GREEN, PLASTIC, LCC-68
XR16C854IQ	EXAR	获取价格	QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854IQ-F	EXAR	获取价格	Serial I/O Controller, 4 Channel(s), 0.25MBps, CMOS, PQFP100, 14 X 20 MM, GREEN, PLASTIC,
XR16C854IQTR-F	EXAR	获取价格	Serial I/O Controller, CMOS
XR16C854IV	EXAR	获取价格	QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO

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