The 8051 microcontroller family refers to a series of microcontrollers that are based on the original Intel 8051 architecture. Over the years, several semiconductor manufacturers have developed their own versions or derivatives of the 8051 microcontroller, each with its own set of features and capabilities. Various 8051 microcontrollers You will not see 8051 part number […]
Power Saving mode in 8051 microcontroller is used to save energy during idle time of processor and during power down time of processor. So, is important to make microcontroller as a power saving device. The 8051 uses current of approximately 25 mA during the normal operation. In power saving mode, the 8051 microcontroller reduces its
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The 8051 microcontroller is widely used in various embedded systems applications due to its simplicity, ease of use, and versatility. One of the essential components of the 8051 microcontroller is its Boolean Processor, which plays a crucial role in performing logical and bitwise operations. The 8051 microcontroller supports bit addressable memory and bit manipulation instructions
Registers in 8051 microcontroller is mainly classified into General purpose registers Special function registers (SFRs) General Purpose Registers in 8051 Totally 34 general purpose registers or working registers. They are used to store data. Two of these A and B hold results of many instructions, particularly arithmetic and logical operations of 8051 CPU. The other
Reset occurs when the RST pin is supplied with a positive pulse in duration of at least 2 machine cycles (24 clock cycles of crystal oscillator). After that, the microcontroller generates an internal reset signal which clears all SFRs, except SBUF registers, Stack Pointer and ports (the state of the first two ports is not
All 8051 microcontrollers have 4 input-output (IO) ports each of 8-bits which can be configured as inputs or outputs. The four ports are port 0, port 1, port 2 and port 3. Let’s understand the port structure of 8051 microcontroller for each port. Input/Output Ports in 8051 Microcontroller In order to configure a microcontroller pin
All 8051 microcontrollers have 4 I/O ports each comprising 8 bits which can be configured as inputs or outputs. The four ports are port 0, port 1, port 2 and port 3. Lets understand the functions of ports in 8051 microcontroller. Each port is 8-bit port having 8 pins and has D-type o/p latch for
The 8051 microcontroller is a popular 8-bit microcontroller widely used in embedded systems. Its timing and control unit (TCU) is responsible for generating and controlling the timing signals required for the proper functioning of the microcontroller. Functions Here are the main functions of the 8051 timing and control unit: Clock Generation: The TCU generates the
Microcontroller 8051 has many registers mainly classified into General purpose and Special Function registers. SP, PC and DPTR are the special function registers used in 8051 microcontrollers which work as memory pointer. Let’s see the function of Stack Pointer Data Pointer and Program counter in 8051 Microcontroller one by one. The Stack Pointer (SP) in
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In this article, we will discuss about the concept of stack and stack pointer in 8051 microcontroller. 8051 Stack Pointer The stack is a section of internal RAM used by the CPU to store information temporarily. This information could be data or an address. The CPU needs this storage area since there are only limited
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