Atmel AT89STK-06 Manual do Utilizador descarregar pdf (Página 6)

Hardware Description

2-4 AT89STK-06 Demo Board Software Demo Guide

4339C–CAN–07/05

– No specific polarization mandatory

Note: There is a diode voltage level between the negative output of the power supply

and the “GND”. This could introduce some gap of voltage during measurement

and instrumentation.

Figure 2-2 . Male JACK Outlet and Wires

Caution: Do not mount more than one power supply source on AT89STK-06 board.

J5 - 9V Battery connector: – Need of a female 2 points connector

– Input supply from 6 up to 10V DC (example: 9V battery)

– Polarization mandatory

Figure 2-3 . EXT PWR Female Connector / Cable for 9V Battery

Caution: Do not mount more than one power supply source on AT89STK-06 Starter Kit.

2.3 RESET Although the AT89C51CC03 & AT89C51AC3 microcontrollers have on-chip RESET

circuitry (c.f. microcontroller datasheet), the AT89STK-06 board provides to the

microcontroller a RESET signal witch can come from 2 different sources:

2.3.1 Power-on RESET The on-board RC network acts as power-on RESET.

2.3.2 RESET Push Button By pressing the RESET push button on the AT89STK-06 board, a warm RESET of the

microcontroller is performed.

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Atmel AT89STK-06 Manual do Utilizador Página 6