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ATMEGA164P-20PU Datasheet(PDF) 7 Page - ATMEL Corporation |
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ATMEGA164P-20PU Datasheet(HTML) 7 Page - ATMEL Corporation |
7 / 26 page 7 8011KS–AVR–09/08 ATmega164P/324P/644P 2.3.7 RESET Reset input. A low level on this pin for longer than the minimum pulse length will generate a reset, even if the clock is not running. The minimum pulse length is given in ”System and Reset Characteristics” on page 332. Shorter pulses are not guaranteed to generate a reset. 2.3.8 XTAL1 Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. 2.3.9 XTAL2 Output from the inverting Oscillator amplifier. 2.3.10 AVCC AVCC is the supply voltage pin for Port A and the Analog-to-digital Converter. It should be exter- nally connected to V CC, even if the ADC is not used. If the ADC is used, it should be connected to V CC through a low-pass filter. 2.3.11 AREF This is the analog reference pin for the Analog-to-digital Converter. 3. Resources A comprehensive set of development tools, application notes and datasheetsare available for download on http://www.atmel.com/avr. 4. Data Retention Reliability Qualification results show that the projected data retention failure rate is much less than 1 PPM over 20 years at 85°C or 100 years at 25°C. |
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