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Honored Contributor
11 years agoSorry. My mistake.
I am using Stratix IV GX FPGA Development Kit The 230 edition. http://www.altera.co.uk/products/devkits/altera/kit-siv-gx.html In the reference manual, page 2-63 (pdf page 71) shows the 12V and 3.3V rails are directly connected to the hsmc. I checked the schematic as well. Everything seems ok to me except for 1 thing. The power measurement circuitry uses 12V_out (from the DC jack) and 12V to HSMC (Labels from schematic. Page 21). And these are connected to LTC4151. A power measurement IC. (ADC with a i2c interface). page 25 of schematic. The i2c interface goes to the EPM2210 System Controller. I don't know whether the system controller would trigger an auto-shutdown when/if detecting current flowing in the opposite direction.. Thanks ZubairLK