First of all, bit and sbit are both variable types extended by C51.
sbit is generally used to define bit variables of special function registers to facilitate operations on a certain bit of the register.
For example: sbit TXD=P3^0; This defines TXD as a bit variable, and this sbit has a certain address.
Bit is similar to a general variable, except that the variable defined by bit has only two values: 0 or 1.
For example: bit p=0; the compiler will assign an address during the compilation process, and the assigned address is random.
Reference address：What is the difference between sbit and bit in C51 programming
sbit is generally used to define bit variables of special function registers to facilitate operations on a certain bit of the register.
For example: sbit TXD=P3^0; This defines TXD as a bit variable, and this sbit has a certain address.
Bit is similar to a general variable, except that the variable defined by bit has only two values: 0 or 1.
For example: bit p=0; the compiler will assign an address during the compilation process, and the assigned address is random.
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sbit and sfr in single chip c language
1. Both bit and sbit are variable types extended by C51.
Bit is similar to int char, except that char = 8 bits and bit = 1 bit. They are all variables, and the compiler assigns addresses during the compilation process. Unless you specify, the address is random. This address is the entire addressa
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