Microchip Technology 8-Bit-AVR®-Microcontroller ATmega328 von Atmel

Die Atmel ATmega328 8-Bit-AVR®-Mikrocontroller (MCU) sind hochleistungsfähige, RISC-basierte Bausteine, die einen 32kB-ISP-Flash-Speicher mit Lesezugriff während Schreibvorgängen, 1kB EEPROM, 2kB SRAM, 23 Universal-I/Os, 32 Universal-Arbeitsregister, eine serielle programmierbare USART-Schnittstelle und mehr enthalten. Die MCUs ATmega328 von Atmel führen leistungsfähige Befehle in einem einzigen Taktzyklus aus. Dadurch kann der Baustein eine Verarbeitungsleistung von bis zu 1MIPS pro MHz erreichen und gleichzeitig wird der Stromverbrauch und die Verarbeitungsgeschwindigkeit ausgeglichen. Diese Atmel-MCUs sind für die Verwendung in der Industrie-Automation und in der Heim- und Gebäudeautomation konzipiert.

Merkmale

High performance, low power AVR® 8-Bit Microcontroller family
Advanced RISC architecture
- 131 powerful instructions – most single clock cycle execution
- 32 x 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
- 4/8/16/32KBytes of in-system self-programmable Flash program memory
- 256/512/512/1KBytes EEPROM
- 512/1K/1K/2KBytes internal SRAM
- Write/erase cycles 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 an 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, and capture mode
Real-time counter with separate oscillator
- Six PWM channels
- 8-channel 10-bit ADC in TQFP and VQFN package
Temperature measurement
- 6-channel 10-bit ADC in SPDIP package

Temperature measurement
- 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
- Power-on reset and programmable brown-out detection
- Internal calibrated oscillator
- External and internal interrupt sources
- Six sleep modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby
I/O and packages
- 23 programmable I/O lines
- 28-pin SPDIP, 32-lead TQFP, 28-pad VQFN, and 32-pad VQFN
Operating voltage
- 1.8 - 5.5V
Temperature range
- -40°C to 85°C
Speed grade
- 0-4MHz at 1.8-5.5V, 0-10MHz at 2.7-5.5.V, 0-20MHz at 4.5-5.5V
Power consumption at 1MHz, 1.8V, 25°C
- Active mode 0.2mA
- Power-down mode 0.1µA
Power-save mode 0.75µA (including 32kHz RTC)