newbieeee question about PIC

[philipsi]

heloo.i am new to PIC microcontroller.i hope i can get support here.
in the PIC,there is a pin called MCRL.what is the function of this pin.normally it is brought high.if i momentarily bring it low,what is the effect?does it affect the code that i downloaded into the chip?

 

[The Real MicroMan]

MCLR is the PIC's master reset. You pull this line up though a high value resitor, like 10k or higher to +5v. If you put this line to ground it will rest the micro. ie. it will go to the start of you program again. If you keep this line on ground you controller will not work. has to be high to start running the code.

 

[philipsi]

that means if the program is executing on the half way and i suddenly pull down the MCLR pin, the program will jump to the beginnening and re-execute again?
if i do like this, will the program inside being erased?

if on the midway i suddenly cut the power suppllied to the PIC and reconnect again, the program will start from beginning again?

 

[cubnflyer]

No It will not erase the program, only reset all file values. it basically reboots the chip.