Products > Integrated Circuits (ICs) > ATMEGA324PB-AUR
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Manufacturer :
Microchip Technology, Inc
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RoHs Status:
Lead free / RoHS Compliant

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ATMEGA324PB-AUR Product Details

The high-performance Microchip picoPower 8-bit AVR RISC-basedmicrocontroller combines 32kB ISP flash memory with read-while-writecapabilities, 1kB EEPROM, 2kB SRAM, 39 general purpose I/O lines, 32general purpose working registers, five flexible timer/counters withcompare modes, internal and external interrupts, three USARTs withwake-up on start of transmission, two byte-oriented 2-wire serialinterface, two SPI serial ports, one 8-channel 10-bit ADC with optionaldifferential input stage with programmable gain, programmable watchdogtimer with internal oscillator, a JTAG (IEEE 1149.1 compliant) testinterface for on-chip debugging and programming, and six softwareselectable power saving modes. The device operates between 1.8-5.5volts.

The ATMEGA324PB-AUR features the successful QTouch PeripheralTouch Controller (PTC). The PTC acquires signals in order to detecttouch on capacitive sensors, and supports both self- andmutual-capacitance sensors. The ATMEGA324PB-AUR PTC is supported by theMicrochip QTouch Composer development tool (QTouch Library projectbuilder and QTouch Analyzer). It provides a faster and less complexcapacitive touch implementation in any application.

It supports 32buttons in self-capacitance mode, or up to 256 buttons inmutual-capacitance mode. Mix-and-match mutual-and self-capacitancesensors is possible, and only one pin is required per electrode noexternal components are required, giving savings on the BOM costcompared to competing solutions.

By executing powerfulinstructions in a single clock cycle, the device achieves throughputsapproaching 1 MIPS per MHz, balancing power consumption and processingspeed.


  • 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
    • 32KBytes of In-System Self-Programmable Flash program memory
    • 1KBytes EEPROM
    • 2KBytes Internal SRAM
    • Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
    • Data retention: 20 years at 85°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
  • Peripheral Features
    • Peripheral Touch Controller (PTC)
      • Capacitive Touch Buttons, Sliders and Wheels
      • 24 Self-Cap Channels and 144 Mutual Cap Channels
    • Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
    • Three 16-bit Timer/Counters with Separate Prescaler, Compare Mode, and Capture Mode
    • Real Time Counter with Separate Oscillator
    • Ten PWM Channels
    • 8-channel 10-bit ADC in TQFP and QFN/MLF package
    • ThreeProgrammable Serial USARTs
    • Two Master/Slave SPI Serial Interfaces
    • Two Byte-Oriented 2-Wire Serial Interfaces (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 8 MHz Calibrated Oscillator
    • External and Internal Interrupt Sources
    • Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby
    • Clock Failure Detection Mechanism and Switch to Internal 8 MHz RC Oscillator in case of Failure
    • Individual Serial Number to Represent a Unique ID
  • I/O and Packages
    • 27 Programmable I/O Lines
    • 32-pin TQFP and 32-pin QFN/MLF
  • Operating Voltage:
    • 1.8 - 5.5V
  • Temperature Range:
    • -40°C to 105°C
  • Speed Grade:
    • 0 - 4MHz @ 1.8 - 5.5V
    • 0 - 10MHz @ 2.7 - 5.5.V
    • 0 - 20MHz @ 4.5 - 5.5V
  • Power Consumption at 1MHz, 1.8V, 25°C
    • Active Mode: 0.24mA
    • Power-Down Mode: 0.2μA
    • Power-Save Mode: 1.3μA (Including 32kHz RTC)

Technical Parameters

Core Processor AVR RAM Size 2K x 8
Core Size 8-Bit Voltage Supply (Vcc/Vdd) 1.8V ~ 5.5V
Speed 20MHz Data Converters A/D 8x10b
Connectivity I2C, SPI, UART/USART Oscillator Type Internal
Peripherals Brown-out Detect/Reset, POR, PWM, WDT Operating Temperature -40??C ~ 85??C (TA)
Number of I/O 39 Mounting Type Surface Mount
Program Memory Size 32KB (16K x 16) Package / Case 44-TQFP
Program Memory Type FLASH Supplier Device Package 44-TQFP (10x10)
EEPROM Size 1K x 8

ATMEGA324PB-AUR Documents

  • ATmega324PB Technical Documentation of Application Note
  • ATmega324PB Technical Documentation of Application Note
  • ATmega324PB Technical Documentation of Application Note
  • ATmega324PB Technical Documentation of Application Note

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