Instructions with register Rn as destination operand (3 instructions)
The function of these three instructions is to send the contents specified by the source operand to the selected working register Rn, and the source operand remains unchanged. There are direct, immediate and register addressing modes:
MOV Rn,data; (data) → (Rn) The contents of the direct addressing unit are sent to register Rn
MOV Rn,#data;#data→（Rn）The immediate data is directly sent to register Rn
MOV Rn,A; (A) → (Rn) The contents of accumulator A are transferred to register Rn.
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C51 Definition of Special Function Registers in MCS51 Microcontroller
Before we start to talk about the definition of the special register (SPR) in the C51 microcontroller, let's first briefly introduce the two keywords "sbit" and "sfr" that we often see when developing 51 microcontrollers:
SFR is used to assign a special function register of a microcontroller to a variable, so that the
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