ST16C650AIQ48TR-F

更新时间： 2024-11-22 13:02:35

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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53页	631K
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ST16C650A

2.90V TO 5.5V UART WITH 32-BYTE FIFO

REV. 5.0.0

JANUARY 2004

FEATURES

GENERAL DESCRIPTION

Added features in top mark date code of "HC YYWW"

and newer:

The ST16C650A¹(650A) is a 2.90 to 5.5 volt

Universal Asynchronous Receiver and Transmitter

(UART) with 5 volt tolerant inputs. This device

supports Intel and PC ISA mode data bus interfaces

and is software compatible to industry standard

16C450, 16C550, ST16C580 and ST16C650A

UARTs.

■ 2.90 to 5.5 Volt Operation

■ 5 Volt Tolerant Inputs

■ Automatic RS485 Half-Duplex Control Output

■ Programmable Infrared Encoder Pulse Width

■ Sleep Mode with Wake-up Indicator

■ Device ID & Revision

The 650A has 32 bytes of TX and RX FIFOs and is

capable of operating up to serial data rates of 3.125

Mbps at 5 volt supply voltage. The internal registers

include the 16C550 register set plus Exar’s enhanced

registers for additional features to support today’s

highly demanding data communication needs. The

enhanced features include automatic hardware and

software flow control, selectable TX and RX trigger

levels, and wireless infrared (IrDA) encoder/decoder.

■ Up to 3.125 Mbps Data Rate at 5 Volts

Added feature in top mark date code of "I2 YYWW"

and newer:

■ 0 ns address hold time

• Intel or PC Mode 8-bit Bus Interface

• 32-byte Transmit and Receive FIFOs

• Automatic Hardware (RTS/CTS) Flow Control

• Hardware Flow Control Hysteresis

• Automatic Software (Xon/Xoff) Flow Control

The device provides a new capability to give user the

ability to program the wireless infrared encoder

output pulse width, hence reducing the power

consumption of a handheld unit.

APPLICATIONS

The ST16C650A device comes in the 44-pin PLCC

and 48-pin TQFP packages in both the commercial

and industrial temperature ranges.

• Battery Operated Electronics

• Handheld Terminal

NOTE: 1 Covered by US patents #5,649,122.

• Personal Digital Assistants

• Cellular Phones DataPort

• Wireless Infrared Data Communications Systems

FIGURE 1. BLOCK DIAGRAM

RESET

A2:A0

32 Byte TX FIFO

Transmitter

D7:D0

Infrared Encoder and

Pulse Width Control

IOR#

IOR

IOW#

CTS Flow

Control

UART

Configuration

Regs

Intel,

Motorola

or PC

Data Bus

Interface

IOW

DTR#, DSR#,

RTS#, CTS#,

CD#, RI#

CS2#

CS1

CS0

Modem Control Signals

RTS Flow

Control

Infrared

Decoder

INT

TXRDY#

Receiver with Auto

Software Flow Control

RDRDY#

DDIS#

32 Byte RX FIFO

BRG

Prescaler

SEL

Baud Rate Generator

Crystal Osc/Buffer

IRQA

IRQB

IRQC

PC Mode:

COM 1 to 4

Decode Logic

XTAL1/CLK

XTAL2

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

12 3 4 5 6 7...53

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