Electronic Circuits and Tutorials
8051/8052 Microcontroller Tutorial

"B" Register - 8051 Microcontroller

Author : Craig Steiner
Source : 8052.com

Book : The 8051/8052 Microcontroller:
         Architecture, Assembly Language, And Hardware Interfacing (Paperback)

The "B" Register

The "B" register is very similar to the Accumulator in the sense that it may hold an 8-bit (1-byte) value.

The "B" register is only used by two 8051 instructions: MUL AB and DIV AB. Thus, if you want to quickly and easily multiply or divide A by another number, you may store the other number in "B" and make use of these two instructions.

Aside from the MUL and DIV instructions, the "B" register is often used as yet another temporary storage register much like a ninth "R" register.

>>> Enter here for detail on "B" Register <<<

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