AT89STK-11 查看數據表（PDF） - Atmel Corporation

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AT89STK-11

AT89STK-11 Starter Kit Hardware User Guide

Atmel Corporation 

Figure 2-3. Male JACK Outlet and Wires

Hardware Description

2.3.1.2 External EXT

connector

Note: Do not mount more than one power supply source on AT89STK-11 Board.

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

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

and instrumentation.

The battery power connector implemented on board is a male two point SIP connector.

It requires an external power cable with a female 2 points connector.

When powered though this interface, polarization is mandatory as no protection is given

on board.

The EXT power supply circuitry support input supply from 2.7V up to 5.5V DC.

Figure 2-4. EXT PWR Female Connector / Cable

Note: Do not mount more than one power supply source on board.

Note: Keep SP1 closed when using the EXT input

2.4

2.4.1

2.4.2

Reset

To be compatible with Atmel microcontrollers which have (or not) its on-chip RESET cir-

cuitry (c.f.microcontroller datasheet), the board provides a RESET signal witch can

come from 2 different sources:

Power-on RESET

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

RESET Push Button By pressing the RESET push button on the board, a warm RESET of the microcontroller

is performed.

AT89STK-11 Hardware User Guide

2-6

7676B–8051–08/07

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