![]() Programmable Watchdog Timer with Separate On-chipOscillator Two 8-bit counters with Separate Prescaler and compare mode, One 16-bit counter with Separate Prescaler,compare mode and capture mode. Master/Slave SPI Serial Interface(17,18,19 PINS) ![]() SDA (Two-wire Serial Bus Data Input/output Line) This is the clock shared between this controller and other system for accurate data transfer. When controller acts as slave, the data is sent to master by this controller through this pin. OC2 (Timer/Counter2 Output Compare Match Output) When controller acts as slave, the data is received by this pin. OC1B (Timer/Counter1 Output Compare Match B Output) ![]() This pin is low when controller acts as slave. OC1A (Timer/Counter1 Output Compare Match A Output) The divided system clock can be output on the PB0 pin) OC0A(PWM - Timer/Counter0 Output Compare Match A Output)ĬLKO (Divided System Clock. OC0B(PWM - Timer/Counter0 Output Compare Match B Output) XTAL1 (Chip Clock Oscillator pin 1 or External clock input) OC2B(PWM - Timer/Counter2 Output Compare Match B Output) PC6 can only be used as I/O pin when RSTDISBL Fuse is programmed. We will describe functions of each pin in below table. Many pins of the chip here have more than one function. It is the most popular of all AVR controllers as it is used in ARDUINO boards.ĪTMEGA328P is a 28 pin chip as shown in pin diagram above. ATMEGA328P is an 8-bit microcontroller based on AVR RISC architecture. ATMEGA328P is high performance, low power controller from Microchip.
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