Re: Microprocessor
Hope you find this useful:
The term 8-bit means that the ALU (Arithmetic Logic Unit), the internal registers, and most of the instructions are designed to work with 8-bit binary words.
It's not related to the data bus. For example: The 8086, which is a 16-bit microprocessor has a 16-bit data bus; whereas it's address bus is 20-bit.
In short a microprocessor with a 8-bit ALU will be referred to as an 8-bit microprocessor.
Source of the above information:
Microprocessors and Interfacing, 2nd ED by Douglas V. Hall