ATMEGA324PB-AU 8-bit ATMega AVR® microcontroller, 32 KB, 20 MHz, TQFP-44

Summary The high-performance Microchip picoPower 8-bit AVR RISC-based microcontroller combines 32kB ISP flash memory with read-while-write capabilities, 1kB EEPROM, 2kB SRAM, 39 general purpose I/O lines, 32 general purpose working registers, five flexible timer/counters with compare modes, internal and external interrupts, three USARTs with wake-up on start of transmission, two byte-oriented 2-wire serial interface, two SPI serial ports, one 8-channel 10-bit ADC with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, a JTAG (IEEE 1149.1 compliant) test interface for on-chip debugging and programming, and six software selectable power saving modes. The device operates between 1.8-5.5 volts.

The ATmega324PB features the successful QTouch Peripheral Touch Controller (PTC). The PTC acquires signals in order to detect touch on capacitive sensors, and supports both self- and mutual-capacitance sensors. The ATmega324PB PTC is supported by the Microchip QTouch Composer development tool (QTouch Library project builder and QTouch Analyzer). It provides a faster and less complex capacitive touch implementation in any application.

The ATmega324PB supports 32 buttons in self-capacitance mode, or up to 256 buttons in mutual-capacitance mode. Mix-and-match mutual-and self-capacitance sensors is possible. Only one pin is required per electrode and no external components are required, delivering savings on the BOM cost compared to competing solutions.

By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.

Additional Features

- 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 - 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 - In-System Programming by On-chip Boot Program - True Read-While-Write Operation - Programming Lock for Software Security - 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 - 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 - 39 Programmable I/O Lines - 44-pin TQFP and 44-pin QFN/MLF - 1.8 - 5.5V - -40°C to 105°C - 0 - 4MHz @ 1.8 - 5.5V - 0 - 10MHz @ 2.7 - 5.5.V - 0 - 20MHz @ 4.5 - 5.5V - Active Mode: 0.24mA - Power-Down Mode: 0.2µA - Power-Save Mode: 1.3µA (Including 32kHz RTC)