Datasheet > A8251

A8251

更新时间： 2024-11-09 03:17:07

品牌	Logo	应用领域
阿尔特拉 - ALTERA		通信
页数	文件大小	规格书
21页	330K
描述
Programmable Communications Interface

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数据手册

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A8251 数据手册

a8251

Programmable Communications

Interface

June 1997, ver. 2

Data Sheet

■ a8251MegaCore function that provides an interface between a

Features

microprocessor and a serial communication channel

■

Optimized for FLEX^®architecture

Programmable word length, stop bits, and parity

Offers divide-by-1, -16, or -64 mode

Supports synchronous and asynchronous operation

Uses approximately 528 FLEX logic elements (LEs)

Includes:

–

Error detection

False start bit detection

Automatic break detection

Internal and external sync character detection

■

Functionally based on the Intel M8251A device, except as noted in the

“Variations & Clarifications” on page 44

The a8251MegaCore function provides an interface between a

microprocessor and a serial communications channel. The a8251receives

and transmits data in a variety of configurations including 7- or 8-bit data

words, with odd, even, or no parity, and 1 or 2 stop bits. The transmitter

and receiver can be designed for synchronous or asynchronous operation.

See Figure 1.

General

Description

Figure 1. a8251 Symbol

A8251

CLK

CnD

DOUT[7..0]

nDTR

DIN[7..0]

EXTSYNCD

nCS

nEN

nRTS

nCTS

RXRDY

SYN_BRK

TXD

TXEMPTY

TXRDY

nDSR

nRD

nRXC

nTXC

nWR

RESET

RXD

Altera Corporation

A-DS-A8251-2

12 3 4 5 6 7...21

中文翻译

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