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ASIC chip temp not working #59
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Hi Skot. My EMC2101 is reading the temperature. I added a pretty good thermal pad on the chip and finally got a temperature below the maximum. It is reading temperature around 63C. Another detail that I noticed. After adding the thermal pad, the current decreases by 1A for the same hash/rate. I didn't expect that. |
Is this on the bitaxeUltra with the BM1366? |
When you get that square wave on the ASIC die temp pins, is it also connected to the EMC2101? Those die temp pins are connected to a diode (or transistor) on the die. To measure the temperature you put two different currents through it and the difference in forward voltage is proportional to the temperature. That would be one explanation for the square wave. It also seems like you have a soldering problem and/or the ASIC is damaged. I have been able to read the chip temp just fine on several BM1397. |
The EMC2101 is connected. I didn't know it has an active connection for parasitic resistance in series. |
Confirmed the BM1366 does not have internal temp diode pins :( |
The pins I thought were the on-die chip temp sensor don't seem to be working. the EMC2101 will read 127ºC, the max temp all the time.
It's probably best to DNP resistors R7 and R8 to disconnect the EMC2101 from the BM1366 for now. (it will read 0ºC after that)
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