Описание
The Microchip 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 Atmel® 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 16MIPS throughput at 16MHz (Atmel ATmega165PA/645P)
- Up to 20MIPS throughput at 20MHz (Atmel ATmega165A/325A/325PA/645A/3250A/3250PA/6450A/6450P)
- On-chip 2-cycle multiplier
- High endurance non-volatile memory segments
- In-system self-programmable flash program memory
- 32KBytes (ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA)
- EEPROM
- 1Kbytes (ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA)
- Internal SRAM
- 2KBytes (ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA)
- 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 On-chip Boot Program
- True read-while-write operation
- Programming lock for software security
- Atmel QTouch® library support
- Capacitive touch buttons, sliders and wheels
- Atmel QTouch 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
