Описание
The ATmega325A is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, this microcontroller achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
- High performance, low power AVR® 8-Bit Microcontroller
- Advanced RISC architecture
- 130 powerful instructions – most single clock cycle execution
- 32 × 8 general purpose working registers
- Fully static operation
- Up to 20MIPS throughput at 20MHz
- High endurance non-volatile memory segments
- 32Kbytes of In-system self-programmable flash program memory
- 1Kbytes of EEPROM
- 2Kbytes of 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 with Independent Lock Bits
- In-System Programming by On-chip Boot Program
- True read-while-write operation
- Programming lock for software security
- Touch® library support
- Capacitive touch buttons, sliders and wheels
- Touch and QMatrix acquisition
- Up to 64 sense channels
- JTAG (IEEE std. 1149.1 compliant) interface
- Boundary-scan capabilities according to the JTAG standard
- Extensive on-chip debug support
- Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
- 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
- Four PWM channels
- 8-channel, 10-bit ADC
- Programmable serial USART
- Master/Slave SPI Serial Interface
- Universal Serial Interface with Start Condition detector
- 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
- Five sleep modes: Idle, ADC Noise Reduction, Power-save, Power-down and Standby
- I/O and packages
- 54/69 programmable I/O lines
- 64/100-lead TQFP, 64-pad QFN/MLF and 64-pad DRQFN
- Speed grade:
- ATmega3250A: 0 – 20MHz @ 1.8 – 5.5V
- Temperature range:
- -40°C to 85°C industrial
- Ultra-low power consumption (picoPower® devices)
- Active mode:
- 1MHz, 1.8V: 215µA
- 32kHz, 1.8V: 8µA (including oscillator)
- Power-down mode: 0.1µA at 1.8V
- Power-save mode: 0.6µA at 1.8V (Including 32kHz RTC)
