Less than 8 -bit architecture of the computer is meant in the following a processor or microcontroller architectures:

  • Intel, the 8008 - and 8080 models
  • Of the MOS 6502 series
  • Motorola the 6800 series.
  • Zilog Z80, the series
  • Intel and other models of the MCS-51 and MCS-48 series (very widely used for embedded applications ).
  • Microchip PIC10 to PIC18 series, the
  • Cypress PSoC series
  • NEC the 78K0 Series
  • Atmel AVR family: complete redesign of an 8 -bit RISC architecture

And various other designs.

In simplified terms, means 8 bits that the processors are designed by their design so that 8 bits ( ie 1 byte) can be simultaneously processed or during a cycle. Register and address bus are often 16 bits wide, the memory area is partially expanded through memory mapping.

8 -bit processors are also used today still the most common, but not as the main processors in computers, but primarily in the form of embedded systems as a microcontroller. In fact a modern computer system includes a number of 8 -bit processors such as in the mouse and keyboard on the motherboard and in the monitors. Most of the USB device are also based on 8- bit processors.

Processors from the MCS-51 series are produced by many different manufacturers in many variations, are quantified in the market but well behind the PIC processors from Microchip and the Motorola 6800 derivatives such as the 68HC05 and 68HC08 Freescale back, each more than a quarter of the total market.

Processor Architectures word width: 1 -bit architecture | bit-slice architecture | 4 -bit architecture | 8- bit architecture, | 16- bit architecture, | 32- bit architecture, | 64 -bit architecture

Processor instruction set architectures based on structure: CISC | EPIC | NISC | RISC | VLIW | microarchitecture

Processor architectures for optimization purposes: (main) processor | GPU | GPGPU | Sound Processor | Math Processor | Network processor | physics accelerator

  • Processor architecture