Features: • High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
130 Powerful Instructions Most Single Clock Cycle Execution
32 x 8 General Purpose Working Registers
Fully Static Operation
Up to 20 MIPS Throughput at 20 MHz
On-Chip 2-cycle Multiplier
• Non-volatile Program and Data Memories
In-System Self-Programmable Flash, Endurance: 10,000 Write/Erase Cycles 32K bytes
Optional Boot Code Section with Independent Lock Bits
In-System Programming by On-chip Boot Program
True Read-While-Write Operation
EEPROM, Endurance: 100,000 Write/Erase Cycles 1K bytes
Internal SRAM 2K bytes
Programming Lock for Software Security
• 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-lead TQFP, 64-pad QFN/MLF, and 100-lead TQFP
• Speed Grade:
ATmega325PV/ATmega3250PV:
- 4 MHz @ 1.8 - 5.5V, 0 - 10 MHz @ 2.7 - 5.5V
ATmega325P/3250P:
- 10 MHz @ 2.7 - 5.5V, 0 - 10 MHz @ 4.5 - 5.5V
• Temperature range:
-40°C to 85°C Industrial
• Ultra-Low Power Consumption
Active Mode:
420A at 1 MHz, 1.8V
Power-down Mode:
40 nA at 1.8V
Power-save Mode:
750 nA at 1.8VPinout
DescriptionThe ATmega325P/ATmega3250P provides the following features: 32K bytes of In-System Programmable Flash with Read-While-Write capabilities, 1K bytes EEPROM, 2K byte SRAM, 54/69 general purpose I/O lines, 32 general purpose working registers, a JTAG interface for Boundary-scan, On-chip Debugging support and programming, three flexible Timer/Counters with compare modes, internal and external interrupts, a serial programmable USART, Universal Serial Interface with Start Condition Detector, an 8-channel, 10-bit ADC, a programmable Watchdog Timer with internal Oscillator, an SPI serial port, and five software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip functions until the next interrupt or hardware reset. In Powersave mode, the asynchronous timer, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low-power consumption.
The ATmega3250P is manufactured using Atmel's high density non-volatile memory technology. The On-chip In-System re-Programmable (ISP) Flash allows the program memory to be reprogrammed In-System through an SPI serial interface, by a conventional non-volatile memory programmer, or by an On-chip Boot program running on the AVR core. The Boot program of ATmega3250P can use any interface to download the application program in the Application Flash memory. Software in the Boot Flash section will continue to run while the Application Flash section is updated, providing true Read-While-Write operation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip, the Atmel ATmega325P/ATmega3250P is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control applications.
The ATmega325P/ATmega3250P AVR is supported with a full suite of program and system development tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emulators, and Evaluation kits
ATmega3250P Data Sheet
