8-bit ATMega AVR microcontroller, 32 KB, 20 MHz, TQFP-32

product description

The high-performance microchip's ATmega328PB is an 8-bit AVR® RISC-based microcontroller (MCU) with picoPower® technology. It combines 32kB ISP flash memory with read/write capabilities, 1kB EEPROM, 2kB SRAM, 27 universal I/O lines, 32 universal working registers, five flexible timers/counters with comparison modes, internal and external interrupts, two USARTs with wake-up at the start of transmission, two byte-oriented 2-wire serial interfaces, two SPI serial ports, 8-channel 10-bit A/D converter, programmable watchdog timer with internal oscillator, a unique serial number and six power saving modes selectable by software. The device operates between 1.8-5.5 volts.

The ATmega328PB is the first 8-bit AVR MCU to feature the QTouch® Peripheral Touch Controller (PTC), which detects signals to detect touch on capacitive sensors and supports both self and counter capacitance sensors. The PTC is supported by the development tool QTouch Composer (QTouch Library Project Builder and QTouch Analyzer). It provides a faster and less complex capacitive touch implementation in any application.

The ATmega328PB supports 24 keys in self-capacity mode or up to 144 keys in counter-capacity mode. The mixing and tuning of alternating and self-capacitive sensors is possible. Only one pin is required per electrode and no external components are required, resulting in savings in bill of materials costs compared to competing solutions.

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

Functional safety:
This product is recommended for safety-critical applications that address both industrial and automotive products (IEC 61508 and ISO 26262). Necessary documents such as the FMEDA report can be provided on request. Please contact your local Microchip sales office or dealer for more information.

attributes

- Advanced RISC Architecture
- 131 Powerful instructions
- Most single cycle cycles are executed
- 32 x 8 General-purpose working register
- Fully static operation
- Up to 20 MIPS throughput at 20MHz
- On-chip 2 cycle multiplier
- Highly loadable, non-volatile memory segments with long service life
- 32KBytes self-programmable flash program memory in the system
- 1KBytes EEPROM
- 2KBytes Internal SRAM
- Write/erase cycles: 10,000 Flash/100,000 EEPROMs
- Data storage: 20 years at 85°C
- Optional boot code cutout with independent locking bits
- In-system programming through 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
- 2 8-bit timer/counter with separate prescaler and compare mode
- 3 16-bit timer/counter with separate prescaler, compare mode and record mode
- Real-time counter with separate oscillator
- 10 PWM channels
- 8-channel 10-bit ADC in TQFP and QFN/MLF packages
- 2 programmable serial USARTs
- 2 Master/Slave SPI Serial interfaces
- 2 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 at pin change
- Special features of the microcontroller
- 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 mode, power off, standby and extended standby modes
- Clock error detection and switchover to internal 8 MHz RC oscillator in case of error
- Individual serial number to display a unique ID
- I/O and Packages
- 27 Programmable I/O lines
- 32-pole TQFP and 32-pole QFN/MLF
- Operating voltage:
- 1.8 - 5.5V
- Temperature range:
-40°C to 105°C
- Speed:
- 0 - 4MHz @ 1.8 - 5.5V
- 0 - 10MHz @ 2.7 - 5.5.5.V
- 0 - 20MHz @ 4.5 - 5.5V
- Power consumption at 1MHz, 1.8V, 25°C
- Active mode: 0.24mA
- Shutdown mode: 0.2µA
- Energy saving mode: 1.3µA (including 32kHz RTC)