ATMEGA168P-20PU Datasheet PDF - Microchip

●The ATMEGA168P-20PU is a high-performance picoPower 8-bit AVR RISC-based Microcontroller combines 16kB ISP flash memory with read-while-write capabilities, 512byte EEPROM, 1kB SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible timers/counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented 2-wire serial interface, SPI serial port, 6-channel 10-bit A/D converter, programmable watchdog timer with internal oscillator and five software selectable power saving modes. The device operates between 2.7 to 5.5V. By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1MIPS per MHz, balancing power consumption and processing speed. The device is manufactured using the Atmel high density non-volatile memory technology. The on-chip ISP flash allows the program memory to be reprogrammed in-system through an SPI serial interface.

● Advanced RISC architecture

● Power-on reset and programmable brown-out detection

● Internal calibrated RC oscillator

● External and internal interrupt sources

● Six sleep modes - idle, ADC noise reduction, power-save, power-down, standby and extended standby

● 131 Powerful instructions-most single clock cycle execution

● 32 x 8 General purpose working registers

● Fully static operation

● Up to 20MIPS throughput at 20MHz

● On-chip 2-cycle multiplier

● QTouch® library support

● Programmable watchdog timer with separate on-chip oscillator

● On-chip analog comparator

● Interrupt and wake-up on pin change