AT89S53 datasheet(5/26 Pages) ETC2

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User Manual V2.00 Evalu8r

Introduction

he Evalu8r is a feature-packed

evaluation module which has been

specially designed to support a variety

of different single-chip microcontrollers.

Support is offered for for Atmel 8-pin,

20-pin and 40-pin AVR microcontrollers,

together with support for 20-pin and

40-pin 8051 microcontrollers. The

module supports a wealth of typical

microcontroller peripherals including

LED's, push buttons, sounder, A/D and

serial communications. There is also the

provision for two 8-bit ports to be

brought out via headers allowing the

user to develop off-board circuitry.

The Evalu8r module features an In-System

Programming (ISP) port which allows the

Atmel microcontrollers which support ISP to

be programmed in-situe in the socket. The

ISP port is designed to interface to any

Equinox serial programmer including the

'Micro-ISP' and 'Activ8r'. Even the new

Atmel AVR 8-pin microcontroller family

(AT90S2323/AT90S2343) is supported by

this module. It is also possible to place serial

EEPROM's in the 8-pin socket and then

communicate to these device from the

master microcontroller.

The 'Evalu8r' module is now supplied as

standard in both AVR and 8051

microcontroller systems. Many sample

application programs based on this module

are already in existence.

MODULE HIGHLIGHTS

• Supports Atmel 8, 20 and 40-pin

Microcontrollers

• Supports NEW Atmel 8-pin AVR

microcontrollers

• Supports 8-pin serial EEPROM’s

• Features In-System Reprogramming

(ISP) Port

• User configurable RESET Polarity to

support both 8051 and AVR

microcontrollers

• 8 x Light Emitting Diodes (LED’s)

• 5 Push Button Switches

• RS-232 Communications Driver

Circuitry

• Simple Analogue to Digital (A/D)

Converter using on-chip Comparator

• Two ports brought out to headers

allowing external circuitry to be

connected

• On-board power supply

• Pluggable Crystal

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