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

Product Description
Temp Range: -40C to +105C
The ATmega328PB high performance microchip 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 general-purpose I/O lines, 32 general-purpose working registers, five flexible timers/counters with compare modes, internal and external interrupts, two USARTs with wake-up at start of transfer, 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 software-selectable power-saving modes. 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 captures signals to detect touch on capacitive sensors and supports both self and counter capacitive sensors. The PTC is supported by the QTouch Composer development tool (QTouch Library Project Builder and QTouch Analyzer). It provides faster and less complex capacitive touch implementation in any application.

The ATmega328PB supports 24 keys in self-capacitance mode or up to 144 keys in counter-capacitance mode. Mixing and matching of mutual and self capacitive sensors is possible. Only one pin is required per electrode and no external components are needed, resulting in BOM cost savings compared to competitive 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.

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

Features

- Advanced RISC architecture
- 131 High performance instructions
- Most single clock cycles executed
- 32 x 8 general purpose working registers
- Fully static operation
- Up to 20 MIPS throughput at 20MHz
- On-chip 2-cycle multiplier
- Heavy duty, high lifetime non-volatile memory segments
- 32KBytes of 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 lock 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 keys, sliders and wheels
- 24 self-cap channels and 144 mutual cap channels
- 2 8-bit timer/counters with separate prescaler and compare mode
- 3 16-bit timer/counters 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 package
- 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 on 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, shutdown, standby, and extended standby modes
- Clock error detection and switching to internal 8 MHz RC oscillator in case of error
- Individual serial number to represent a unique ID
- I/O and packets
- 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 level:
- 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 off mode: 0.2µA
- Power saving mode: 1.3µA (including 32kHz RTC)