LPC2148 Getting hot

[amayilsamy]

I'm using LPC2148 for my project. Just I switch on the micro controller it getting more heat.

And other functions wise works well.

I measure short Vcc and GND using multimeter . Its having 20 Ohm resistance.

And also draw 500mA.

How to solve this.

 

[wp100]

Hi,

Find the short circuit !

Have you got everything plugged in the right way around ?

When you say other things are working, like you mean the display is on ok ?

Have you made any modifications to the board that might have created a short by poor soldering or wrong component ??

Getting hot and drawing 500ma usually means something will be damaged.

 

[amayilsamy]

I'm working in that board last 2 months. I face this problem last 3 days.

Normally its draw only 130 mA.

When it is getting heat and its start to draw 500 mA.

 

[FvM]

Do you observe the high current with LPC2148 hold in reset? If so, it's most likely an internal damage of the device (e.g. a GPIO cell) because all GPIOs pins are tristated in reset and can't sink or source current.

 

[amayilsamy]

I switch on the controller whole day. It was working good.

I checked all GPIOs its all good.

It was not reset.

When I start fuse the hex file in to the micro controller . I need switch off then switch on then only I can fuse the hex file in to the micro controller.