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ATmega644PA bảng dữ liệu(PDF) 8 Page - ATMEL Corporation

tên linh kiện ATmega644PA
Giải thích chi tiết về linh kiện  8-bit Microcontroller with 16/32/64/128K Bytes In-Sytem Programmable Flash
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ATmega644PA bảng dữ liệu(HTML) 8 Page - ATMEL Corporation

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8
8152G–AVR–11/09
ATmega164PA/324PA/644PA/1284P
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 334. 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.



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