ATMEGA64 データシートの表示（PDF） - Atmel Corporation

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ATMEGA64

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

RESET

XTAL1

XTAL2

AVCC

AREF

PEN

About Code

Examples

ATmega64(L)

Reset input. A low level on this pin for longer than the minimum pulse length will gener-

ate a reset, even if the clock is not running. The minimum pulse length is given in Table

19 on page 50. Shorter pulses are not guaranteed to generate a reset.

Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

Output from the inverting Oscillator amplifier.

AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally

connected to VCC, even if the ADC is not used. If the ADC is used, it should be con-

nected to VCC through a low-pass filter.

AREF is the analog reference pin for the A/D Converter.

This is a programming enable pin for the SPI Serial Programming mode. By holding this

pin low during a Power-on Reset, the device will enter the SPI Serial Programming

mode. PEN has no function during normal operation.

This datasheet contains simple code examples that briefly show how to use various

parts of the device. These code examples assume that the part specific header file is

included before compilation. Be aware that not all C compiler vendors include bit defini-

tions in the header files and interrupt handling in C is compiler dependent. Please

confirm with the C compiler documentation for more details.

7

2490G–AVR–03/04

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