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a16450

廬

Universal Asynchronous

Receiver/Transmitter

Data Sheet

September 1996, ver. 1

Features

s

s

s

s

s

s

s

s

s

a16450

MegaCore function implementing a universal asynchronous

receiver/transmitter (UART)

Optimized for FLEX

廬

and MAX

廬

architectures

Programmable word length, stop bits, and parity

Full duplex operation

Programmable baud rate generator

Prioritized interrupt control

Internal diagnostic/loopback capabilities

Uses approximately 372 FLEX logic elements (LEs)

Functionally based on the National Semiconductor Corporation

NS16450 device, except as noted in

鈥淰ariations & Clarifications鈥?on

page 79

General

Description

The

a16450

MegaCore function implements a universal asynchronous

receiver/transmitter (UART), which provides an interface between a

microprocessor and a serial communications channel. The

a16450

receives and transmits data in a variety of configurations, including 5-, 6-,

7-, or 8-bit data words; odd, even, or no parity; and 1, 1.5, or 2 stop bits.

The

a16450

includes an internal baud rate generator and interrupt

control. See

Figure 1.

Figure 1. a16450 Symbol

A16450

nADS

CLK

CS0

CS1

nCS2

nBAUDOUT

nCTS

CSOUT

nDCD

DDIS

nDSR

nDTR

MR

INTR

RCLK

nOUT1

RD

nOUT2

nRD

nRTS

nRI

SOUT

SIN

DOUT[7..0]

WR

nWR

A[2..0]

DIN[7..0]

Altera Corporation

A-DS-A16450-01

65

next

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