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8-bit PIC and AVR Microcontrollers

What is AVR 8-bit microcontroller?
These are modified Harvard architecture 8-bit RISC single-chip microcontrollers.
AVR was one of the first microcontroller families to use on-chip flash memory for program storage, as opposed to one-time programmable ROM, EPROM, or EEPROM used by other microcontrollers at the time.
What is the difference between AVR and PIC microcontrollers?
PIC has a small fixed hardware stack, so subroutines can't be stacked very deep and a C compiler can't create a stack frame.
AVR has a stack pointer that can address all available RAM..
PIC can only directly address 256 bytes of RAM that have to be bank switched using extra instructions.
AVR can directly address 64k..
What is 8-bit PIC microcontroller?
8-bit PIC® microcontrollers (MCUs) contain Core Independent Peripherals (CIPs) that enable you to create low-power solutions for sensor node, real-time control, connected and other applications.
PIC is a microcontroller element utilized in producing computer robotics, electronics, & similar devices.
While the PIC is produced by Microchip technology and based on embedded system design, the code and data are stored in different registers to enhance input & output.

Microchip's portfolio of uniquely configurable 8-bit PIC and AVR microcontrollers (MCUs) offer flexibility and performance to embedded designers.AVR® MCUs · AVR ® EA Product Family · AVR ® DB Product Family · PIC® MCUsAutres questions

What is AVR 8-bit microcontroller?