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Altera_Forum
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17 years ago

Was my chip burnt ?

I tested the voltage of ASM1117 1.2V on my board, which is 2.5V, and the current is 190.2mA. Obviously, the VCCINT of cyclone2 should be 1.2v, so i doubt whether the chip was burnt. When i cut t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hello,anakha. Thanks for you advise.

I tested my board and found that the voltage of the pins are all right. In my first post, the

voltage of ASM1117-1.2V I tested was 2.5V , the reason is that I forget to jump the GND line to the other board, the two boards shared different GND ,so the voltage was 2.5V. When I lined the two board GND together, the voltage turned to normal.

Unfor, new problem appears. There is no short on my board before power on, and nothing wrong with the ASM1117-1.2V chip, but once power on, the ASM1117-1.2V chip becomes hot. Then I cut Power Supply， test the board, and find the FPGA 1.2V pins are connected to GND. However, after about 3 minutes, I test the board again,the short is gone.

I repeat the experiment , the short repeats.

So, my FPGA was burnt, wasn't?