Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

A problem with reset in microcontroller 89C51

Status
Not open for further replies.
K

K2DGR8

Junior Member level 3
Junior Member level 3
Joined
Sep 23, 2011
Messages
30
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,503
Dear Friends,
I am not getting Vcc at the reset pin..(Pin. No. 9)

I changed the crystal.. I also checked for any short circuits.. But, nothing is short...
What else can I do?
Shall I replace the reset capacitor?

Please help me with the solution..
Thanking you in advance..

In addition to above, I have also checked microcontroller, which is working fine on another circuit
 

in addition to the capacitor there should also be a resistor from the pin 9 to ground. say a 10K resistor....while you place a capacitor from the Vdd to the reset pin also.

the positive terminal of the capacitor should be connected to Vdd while the negative terminal should be connected to the reset pin
hope this helps...
sequel
 

restet connection.JPG

Dear Friend..
Just make simple connection like given circuit....
=> In this connection Initially 5V goes to GND.. But when you press switch 5V appears of RESET pin of 89s52..
 
Last edited:

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top