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TMS320F28377D-EP: difference in Core voltage between 1.8V-1.2V

Part Number: TMS320F28377D-EP
Other Parts Discussed in Thread: SM320F28335-EP

HI Team,

I am using this controller but the core voltage is lower.

I have other controllers in comparison, SM320F28335-EP.

What is the rational for using 1.8V and 1.2V as core voltage.

To conclude.

  • This is dependent on the technology node (transistor size) used on the particular device, as well as to limit power dissipation on chip as devices move to smaller/newer nodes.

    The F28335 device is based on 180nm transistor sizes, while the F28377D is a newer device that is based on 65nm transistor size.