8051 microcontroller is designed by Intel in 1981. It is an 8-bit microcontroller. It is built with 40 pins DIP (dual inline package), 4kb of ROM storage and 128 bytes of RAM storage, 2 16-bit timers. It consists of are four parallel 8-bit ports, which are programmable as well as addressable as per the requirement.
Q. What is meant by 8 bit controller?
Strictly speaking, an 8 bit microcontroller processes 8-bits of data at any particular time. They have 32-bit arithmetic logic units, registers, and bus width. In general, this means that a 32-bit can handle quadruple the amount of data, making it technically more data efficient.
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Q. What does 8 bit signify in an 8 bit microcontroller?
8 bit microcontroller means CPU or ALU can process 8 bit data at a time. Means it has to take 8 bit data from memory (which it has to process). Thus each location in memory is 8 bit and data bus is also 8 bit. Registers in RAM has to be 8 bit for temporary storage of results.
Q. What is the meaning of 8051?
The Intel MCS-51 (commonly termed 8051) is a single chip microcontroller (MCU) series developed by Intel in 1980 for use in embedded systems. The family was continued in 1996 with the enhanced 8-bit MCS-151 and the 8/16/32-bit MCS-251 family of binary compatible microcontrollers.
Q. Is 8051 still used?
Despite the more limited features and old architecture, the 8051 is still used in some wireless communication products. The latest HC-10 Bluetooth modules are based on 8051 core. Although 16-bit or 32-bit MCUs can replace the functions offered by 8051s, the 8-bit MCU is sufficient for many product developers.
Q. Which is faster RISC or CISC?
The performance of RISC processors is often two to four times than that of CISC processors because of simplified instruction set. This architecture uses less chip space due to reduced instruction set. RISC processors can be designed more quickly than CISC processors due to its simple architecture.
Q. What is the frequency 8051 can run at?
around 12 MHz
Q. How many registers are in 8051?
The 8051 contains 34 general-purpose, or working, registers. Two of these, registers A and B, comprise the mathematical core of the 8051 central processing unit (CPU). The other 32 are arranged as part of internal RAM in four banks, BO-B3, of eight registers each, named RO to R7.
Q. How do you declare SFR?
- sfr variables may not be declared inside a function. They must be declared outside of the function body.
- sfr variables are always volatile. The compiler will not optimize accesses to this type of variables.
