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