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Re: can you introduce power on reset for me,what the use of
If not POR then you will be not on the net today ..
This action resets everything inside your computer or a microcontroller based systems, so when you power them up, they start with no "luggage" .. from the "zero" point ..
Re: can you introduce power on reset for me,what the use of
POR puts a system into a known state. If a computer is involved, POR sets up the program counter so that the 1st instruction after the POR is always fetched from a predetermined memory address.
Re: can you introduce power on reset for me,what the use of
as you can know from the name "power on reset", when power is on, the system first introduce a Reset period in which nothing is done. We know there is ripple or variation at supply voltage when the power is on, at the this time if the system is doing some process, it will introduce wrong results.
Re: can you introduce power on reset for me,what the use of
POR ensures that a system is kept in reset at power up, until the voltage reaches a level sufficient for correct operation of the system.
At power up, the voltage rises from zero to the nominal. Thus, the POR ensures that devices are held in reset until the voltage rises above the guaranteed minimum. That way, the system is only allowed to start up when there is no danger of malfunction due to insufficient supply voltage.
For example, if your system power is 5V, usually the devices in it will work properly down to 4.75 or even 4.5V, but no one can guarantee that they will operate properly below that voltage. The POR will release the reset line when the supply voltage is above 4.75V, for example.
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