®

Altera Corporation

57

a6402

Universal Asynchronous

Receiver/Transmitter

September 1996, ver. 1

Data Sheet

A-DS-A6402-01

Features

s

a6402

MegaCore function implementing a universal asynchronous

receiver/transmitter (UART)

s

s

Uses approximately 162 FLEX logic elements (LEs)

s

Programmable word length, stop bits, and parity

s

Full duplex operation

s

Includes status flags for parity, framing, and overrun errors

s

Functionally based on the Harris HD-6402 device, except as noted in

the “Variations & Clarifications” section on page 63

General

Description

The a6402 MegaCore function implements a universal asynchronous

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

microprocessor and a serial communications channel. See Figure 1.

Figure 1. a6402 Symbol

cls1

cls2

crl

ndrr

epe

mr

pi

rrc

rri

sbs

ntbrl

tbr[7..0]

trc

dr

fe

oe

pe

rbr[7..0]

tbre

tre

tro

A6402