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ATmega165A-AN Datasheet(PDF) 8 Page - ATMEL Corporation |
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ATmega165A-AN Datasheet(HTML) 8 Page - ATMEL Corporation |
8 / 24 page 8 ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [SUMMARY] 8285ES–AVR–02/2013 2.3.11 Port J (PJ6:PJ0) Port J is a 7-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port J output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port J pins that are externally pulled low will source current if the pull-up resistors are activated. The Port J pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port J also serves the functions of various special features of the Atmel ATmega3250A/3250PA/6450A/6450P as listed on page 78. 2.3.12 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 Table 28-13 on page 297. Shorter pulses are not guaranteed to generate a reset. 2.3.13 XTAL1 Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. 2.3.14 XTAL2 Output from the inverting Oscillator amplifier. 2.3.15 AVCC AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally 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. 2.3.16 AREF This is the analog reference pin for the A/D Converter. |
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