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 

Hardware Description

2.2

Block Diagram Figure 2-2 shows the functional block diagram of the AT89STK-11, with the I/O usage.

Figure 2-2. Block Diagram of AT89STK-11

PC Host

SPI

Full UART

TWI

External

Power

16MHz

Quartz

EA

RST

ISP

INT0

INT1

C51

PLCC44

P0

P1

Expansion

P2

Area

P3

Power Supply

3V or 5V

Leds:

PWR

ALE

User LEDs User Push Buttons

2.3 Power Supply

2.3.1

Power Supply

Sources

2.3.1.1 JACK PWR

Connector

The on-board power supply circuitry allows various power supply configurations. This

gives the user the capability to power the devices in the 3V and in the 5V voltage range.

The power supply source can come from two different and exclusive sources:

either from the JACK PWR connector

either from the 2-point sip EXT connector.

The Jack power connector implemented on board is a female Jack connector with inter-

nal 2.1mm conductor. It requires a male JACK outlet with 2.1mm capability.

No specific polarization is mandatory as on-board diode rectifier gives a protection

against inadvertent polarization invertion.

When using the JACK power supply, the board is powered with a 5V voltage.

2-5

7676B–8051–08/07

AT89STK-11 Hardware User Guide

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