| Flash (Kbytes) | 64 |
| EEPROM (Kbytes) | 2 |
| SRAM (Bytes) | 4096 |
| Max I/O Pins | 32 |
| F.max (MHz) | 20 |
| Vcc (V) | 1.8-5.5 |
| 16-bit Timers | 1 |
| 8-bit Timer | 2 |
| PWM (channels) | 6 |
| RTC | Yes |
| SPI | 1+USART |
| UART | 2 |
| TWI | Yes |
| ISP | Yes |
| 10-bit A/D Channels | 8 |
| Analog Comparator | Yes |
| Brown Out Detector | Yes |
| Watchdog | Yes |
| On Chip Oscillator | Yes |
| Hardware Multiplie | Yes |
| Interrupts | 31 |
| Ext Interrupts | 32 |
| Self Program Memor | Yes |
| Pb-Free Packages | MLF (VQFN) 44 PDIP 40 TQFP 44 |
64-Kbyte self-programming Flash Program Memory, 4-Kbyte SRAM, 2-KByte EEPROM, 8 Channel 10-bit A/D-converter. JTAG interface for on-chip-debug. Up to 20 MIPS throughput at 20 MHz. 1.8 - 5.5 Volt Operation.
The ATmega164P/324P/644P is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega164P/324P/644P 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
– 131 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
High Endurance Non-volatile Memory segments
– 16/32/64K Bytes of In-System Self-programmable Flash program memory
– 512B/1K/2K Bytes EEPROM
– 1/2/4K Bytes Internal SRAM
– Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
– Data retention: 20 years at 85°C/100 years at 25°C
– 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
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 Prescalers and Compare Modes
– 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
Differential mode with selectable gain at 1x, 10x or 200x
– Byte-oriented Two-wire Serial Interface
– Two Programmable Serial USART
– Master/Slave SPI Serial Interface
– 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 RC 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
– 32 Programmable I/O Lines
– 40-pin PDIP, 44-lead TQFP, 44-pad QFN/MLF (ATmega164P/324P/644P)
– 44-pad DRQFN (ATmega164P)
Operating Voltages
– 1.8 - 5.5V for ATmega164P/324P/644PV
– 2.7 - 5.5V for ATmega164P/324P/644P
Speed Grades
– ATmega164P/324P/644PV: 0 - 4MHz @ 1.8 - 5.5V, 0 - 10MHz @ 2.7 - 5.5V
– ATmega164P/324P/644P: 0 - 10MHz @ 2.7 - 5.5V, 0 - 20MHz @ 4.5 - 5.5V
Power Consumption at 1 MHz, 1.8V, 25°C for ATmega164P/324P/644P
– Active: 0.4 mA
– Power-down Mode: 0.1μA
– Power-save Mode: 0.6μA (Including 32 kHz RTC)
| Speed (MHz) | Power Supply | Ordering Code | Package | Operation Range |
| 8-16 | 2.7 - 5.5V | ATmega644P-A15AZ | ML | -40°C to +125°C |
| 8-16 | 2.7 - 5.5V | ATmega644P-A15MZ | PW | -40°C to +125°C |
