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TaeHoLee's avatar
TaeHoLee
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2 years ago

Cyclone V device difference between 5CEBA7F23C7 and 5CEFA7F23I7

I programmed using the Cyclone V device, 5CEBA7F23C7, and it operated normally. I changed the device to 5CEFA7F23I7, confirmed pin-to-pin compatibility, and didn't use HMC. Instead, I implemented the ...
Fpga Devkit
FvM's avatar
FvM
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2 years ago

Hi,

presume you measured "impedance" with a multimeter. The measurement doesn't mean much because I/V characteristic of supply rails is highly non-linear. Initial current at low voltage ("impedance") also depends on residual charge on internal nodes.

The only reliable information for power consumption is actual supply current. You also need to assure that the design doesn't involve floating inputs without termination.

Regards
Frank

TaeHoLee's avatar
TaeHoLee
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2 years ago
Impedance-related response is appreciated. However, I'm curious about your thoughts on the device generating heat while pulling a significant current yet still operating normally.