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Altera_Forum's avatar
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

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Did you use a cleaning solvent after your soldering re-work?

The resistance values are really fuzzy, sometimes it happens if the soldering flux is mucking up the tracks.

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:p It is the problem! Now my board turned to normal, the AMS chip and FPGA are all properly.

Still exists the CONF_DONE not being pulled to high.:confused:

When power on , i measure the voltage of PIN3 ,4,7,8 and found PIN3 is 3.10V, PIN4 is 3.10V,PIN7 is 0.19V, and PIN8 is 1.02V, the chip is EP2C5T144c8n. The I/Opins voltage of bank2 is different too , some is 3.10V,and some is 1.01V.:confused:

Shouldn't the voltage of I/Opins be 3.3V?