Arduino VS Raspberry pi[Video]: How to differentiate them?

The RP2040 is a microcontroller that stands out for its high performance, low cost, and ease of use. Because of its large on-chip memory, symmetric dual-core processing complex, deterministic bus fabric, and complete peripheral set reinforced with our unique Programmable I/O (PIO) subsystem, it provides professional users with unequaled power and flexibility. It has a low entry barrier for new and inexperienced users, with detailed documentation, a polished MicroPython port, and a UF2 bootloader in ROM.

The RP2040 is a stateless device with execute-in-place functionality cached in external QSPI memory. This design choice allows you to choose the optimum nonvolatile storage density for your application while simultaneously taking advantage of commodity Flash's low pricing. The RP2040 is based on a cutting-edge 40nm process node that offers outstanding performance, low dynamic power consumption, and minimal leakage, as well as a variety of low-power modes for prolonged battery life.

The ATmega328 is a low-power CMOS 8-bit microcontroller based on the AVR® enhanced RISC architecture. By executing instructions in a single clock cycle, the devices achieve CPU throughput approaching one million instructions per second (MIPS) per megahertz, allowing the system designer to optimize power consumption versus processing performance.

RP2040 Features

• Dual ARM Cortex-M0+ @ 133MHz

• 264kB on-chip SRAM in six independent banks

• Support for up to 16MB of off-chip Flash memory via dedicated QSPI bus

• DMA controller

• Fully-connected AHB crossbar

• Interpolator and integer divider peripherals

• On-chip programmable LDO to generate a core voltage

• 2 on-chip PLLs to generate USB and core clocks

• 30 GPIO pins, 4 of which can be used as analog inputs

• Peripherals

ATMEGA328 Features

• High-performance design

• Low power consumption

• The total number of Analog Input pins is 6

• Contains 32 kilobytes of flash memory

• Contains 2 kilobytes of SRAM

• Contains 1 kilobyte of EEPROM

• 16 megahertz clock speed

• Minimum & maximum temperature -40 degrees centigrade to 105 degrees centigrade

• The total number of Digital I/O pins is 14

• Advance RISC

• Lock program functionality for programming code security

• Contains a total of three timers two 8-bit and one 16 bit

• The total number of I/O pins is 23

• The total number of PWM channels is 6

• Minimum and maximum operating voltage from 1.8V DC to 5.5V DC

RP2040 Pinout

ATMEGA328 Pinout

RP2040 Block Diagram

ATMEGA328 Block Diagram

The user IO pins on the left and right edges of the board get the majority of the RP2040 microcontroller pins. Internally, four RP2040 IO are utilized to drive an LED, regulate the on-board Switched Mode Power Supply (SMPS), and since the system voltages.

Many projects and autonomous systems require a simple, low-power, low-cost microcontroller, and the ATmega328 is a popular choice. The popular Arduino development platform, specifically the Arduino Uno, Arduino Pro Mini, and Arduino Nano versions, are perhaps the most common implementations of this chip.

• RP2040 Datasheet

• ATMEGA328 Datasheet

The Raspberry Pi is a microprocessor-based tiny computer, while Arduino is a microcontroller board (SBC). The CPU, RAM, and ROM are all found on the Arduino board's Microcontroller. All of the extra hardware on the Arduino Board is used for power, programming, and IO connectivity. RP2040 and ATMEGA328 are different in many aspects, so I mainly talk about the distinct differences between them. The RAM Size of RP2040 is 264 Kilobytes, while the RAM Size of ATMEGA328 is 2 Kilobytes. And the Flash Size of RP2040 is 2MB, while the Flash Size of ATMEGA328 is 32 kb. What’s more, The MCU Voltage of RP2040 is 3.3 Volts DC, while the  MCU Voltage of ATMEGA328 is 5 Volts DC. Above all are the main differences between them. In the meantime, Atmel single-core 8-bit ATmega328P chips, which clocks in at 16 MHz and have 2 kB of SRAM and just 28 kB of flash storage, power the ATmega328. With its 32-bit Arm Cortex-M0+ running at configurable frequencies up to 133 MHz, the Raspberry Pi Pico's RP2040 is significantly superior.

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RP2040 Package information

ATMEGA328 Package information