ATMEGA48-20AU 8-bit ATMega AVR® microcontroller, 4 KB, 20 MHz, TQFP-32

ATmega48 megaAVR® Data Sheet

Introduction: The ATmega48 is a low power, CMOS 8-bit microcontrollers based on the AVR® enhanced RISC architecture. By executing instructions in a single clock cycle, the devices achieve CPU throughput approaching one million instructions per second (MIPS) per megahertz, allowing the system designer to optimize power consumption versus processing speed.

Features - High performance, low power AVR® 8-bit microcontroller

- Advanced RISC architecture - 131 powerful instructions - most single clock cycle execution - 32 × 8 general purpose working registers - Fully static operation - Up to 20 MIPS throughput at 20MHz - On-chip 2-cycle multiplier

- High endurance non-volatile memory segments - 4 Kbytes of in-system self-programmable flash program memory - 256 bytes EEPROM - 512 bytes internal SRAM - Write/erase cyles: 10,000 flash/100,000 EEPROM - Data retention: 20 years at 85°C/100 years at 25°C(1) - Optional boot code section with independent lock bits, In-system programming by on-chip boot program, True read-while-write operation - Programming lock for software security

- QTouch® library support - Capacitive touch buttons, sliders and wheels - QTouch and QMatrix acquisition - Up to 64 sense channels

- Peripheral features - Two 8-bit timer/counters with separate prescaler and compare mode - One 16-bit timer/counter with separate prescaler, compare mode + capture mode - Real time counter with separate oscillator - Six PWM channels - 8-channel 10-bit ADC in TQFP and QFN/MLF package - 6-channel 10-bit ADC in PDIP Package - Programmable serial USART - Master/slave SPI serial interface - Byte-oriented 2-wire serial interface (Philips I2C compatible) - Programmable watchdog timer with separate on-chip oscillator - On-chip analog comparator - Interrupt and wake-up on pin change

- Special microcontroller features - DebugWIRE on-chip debug system - Power-on reset and programmable brown-out detection - Internal calibrated oscillator - External and internal interrupt sources - Five sleep modes: Idle, ADC noise reduction, power-save, power-down, and standby

- I/O and packages - 23 programmable I/O lines - 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF

- Operating voltage: - 2.7V - 5.5V for Atmel ATmega48/88/168

- Temperature range: - -40°C to 85°C

- Speed grade: - ATmega48/88/168: 0 - 10MHz @ 2.7V - 5.5V, 0 - 20MHz @ 4.5V - 5.5V

- Low power consumption - Active mode: 250µA at 1MHz, 1.8V, 15µA at 32kHz, 1.8V (including oscillator) - Power-down mode: 0.1µA at 1.8V