TL16C552FNR屬于集成電路（IC）的UART（通用異步接收器發(fā)送器）。由美國德州儀器公司制造生產的TL16C552FNRUART（通用異步接收器發(fā)送器）UART（通用異步接收器/發(fā)射器）接口是將來自微控制器或 CPU 的并行位轉換為串行位以便進行傳輸，或將接收到的串行位轉換為并行位以供其他微控制器或 CPU 使用的物理電路。UART 可以使用 RS232、RS422 或 RS485 協(xié)議進行數(shù)據(jù)傳輸，并根據(jù)通道數(shù)、數(shù)據(jù)速率和其他特性（例如內部振蕩器、定時器、計數(shù)器、GPIO 和打印機端口）來選擇。

IBM PC/AT Compatible

Two TL16C550 ACEs

Enhanced Bidirectional Printer Port

16-Byte FIFOs Reduce CPU Interrupts

Independent Control of Transmit, Receive,

Line Status, and Data Set Interrupts on

Each Channel

Individual Modem Control Signals for Each

Channel

Programmable Serial Interface

Characteristics for Each Channel:

? 5-, 6-, 7-, or 8-bit Characters

? Even-, Odd-, or No-Parity Bit Generation

and Detection

? 1-, 1 1/2-, or 2-Stop Bit Generation

3-State TTL Drive for the Data and Control

Bus on Each Channel

Hardware and Software Compatible With

TL16C452

description

The TL16C552 is an enhanced dual channel version of the popular TL16C550 asynchronous communications

element (ACE). The device serves two serial input/output interfaces simultaneously in microcomputer or

microprocessor-based systems. Each channel performs serial-to-parallel conversion on data characters

received from peripheral devices or modems and parallel-to-serial conversion on data characters transmitted

by the CPU. The complete status of each channel of the dual ACE can be read at any time during functional

operation by the CPU. The information obtained includes the type and condition of the transfer operations being

performed and the error conditions.

In addition to its dual communications interface capabilities, the TL16C552 provides the user with a fully

bidirectional parallel data port that fully supports the parallel Centronics-type printer. The parallel port and the

two serial ports provide IBM PC/AT-compatible computers with a single device to serve the three system ports.

A programmable baud rate generator is included that can divide the timing reference clock input by a divisor

between 1 and (216 ? 1).

The TL16C552 is housed in a 68-pin plastic leaded chip carrier.