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In the 8051 microcontroller pin diagram, Vpp refers to the programming voltage pin, which is used during the programming of the microcontroller's memory. It is typically set at a high voltage (around 12V) to enable the programming mode for the internal flash or EPROM. This pin is crucial for writing data into the memory during the initial programming phase and is not used during normal operation.

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What is psen pin in 8051?

Program Store Enable: The read strobe to external program memory.


Is adc present on chip in 8051 or not?

There is no formal adc input on the 8051. However, the CMOS version of the chip can use a technique involving a resistor, diode, and capacitor, along with a bidirectional pin (or one output pin and one input pin) to implement a "quick and dirty" adc function. You discharge the capacitor and then let it charge to the voltage of the input. You measure the time it takes to see the input pin change, and you calculate the input voltage.


Explain about pin diagram of 8051 micro controller?

The microcontrollers have an 8-bit data bus. They are capable of addressing 64K of program memory and a separate 64K of data memory. The 8051 has 4K of code memory implemented as on-chip Read Only Memory (ROM). The 8051 has 128 bytes of internal Random Access Memory (RAM). The 8051 has two timer/counters, a serial port, 4 general purpose parallel input/output ports, and interrupt control logic with five sources of interrupts. Besides internal RAM, the 8051 has various Special Function Registers (SFR), which are the control and data registers for on-chip facilities. The SFRs also include the accumulator, the B register, and the Program Status Word (PSW), which contains the CPU flags. << SHARMILA TANDEL (B.E) ELECTRONICS >>


Difference between 8031 8051 and 8751 microcontrollers?

Answer It is both 8 bit processors in a 40 pin package but it is not pin compatible, it have almost the same functions but it is very difficult to compare the two because it is not the same family.


Circuit diagram of prepaid energy meter?

See the related link below. It is build by using 8051 microcontroller, you can also get the source code from there.

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Explain about pin diagram of 8051 micro controller?

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