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Programmable Interval Timer

ver 1.08

OVERVIEW

The D8254 is a programmable interval

timer/counter, binary compatible with industry

standard 82C54. The D8254 solves one of

the most common problems in any micro-

computer system, the generation of accurate

time delays under software control. The

D8254 can be used as a:

Real time clock

Even counter

Digital one-shot

Programmable rate generator

Square wave generator

Binary rate multiplier

Complex waveform generator

Complex motor controller

KEY FEATURES

Three independent 16-bit counters

Six programmable Counter modes

Interrupt on terminal count

Hardware retriggerable One-Shot

Rate Generator

Square wave mode

Software triggered strobe

Hardware triggered strobe

Binary or BCD counting

Status Read Back Command

Simple interface allows easy connection

to microcontrollers

Fully synthesizable, static design with no

internal tri-states

Source code:

VHDL Source Code or/and

VERILOG Source Code or/and

Encrypted, or plain text EDIF netlist

VHDL & VERILOG test bench environ-

ment

Active-HDL automatic simulation mac-

ros

ModelSim automatic simulation macros

Tests with reference responses

Technical documentation

Installation notes

HDL core specification

Datasheet

Synthesis scripts

Example application

Technical support

IP Core implementation support

3 months maintenance

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Delivery the IP Core updates, mi-

nor and major versions changes

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Delivery the documentation up-

dates

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Phone & email support