Powering unused MGTs in XC4VFX20CES2

Sorry, I forgot to ask another question. Since I'm using the ES2, the transceiver pins for MGT_110 are not available.

Do I also need to power this MGT_110 with the suggested voltage?

Thanks, Peter

Peter,

The requirement to power unused MGTs is to meet ESD performance. If the power and ground pins are left unconnected (to the MGT), it is unknown what the ESD protection performance will be (basically, it is not tested that way).

The voltage can be 1.2V (no issue with 1.1V, as you are not using the MGTs).

Also, filtering is not required (as they will not actually be enabled).

If one MGT is left unpowered, be sure the ground supply pin is connected to ground, at a minimum.

Aust> Hi!

The powering requirements for unused MGTs are to make sure that everything on the part is in a known state. This means that you can cut some corners for these MGTs. You can safely power the AVCCAUXTX and AVCCAUXRX from your VCCINT 1.2V supply and not the 1.1V and you don't need any power filtering on these pins.

You comment regarding 1.1V in the current errata vs -0.5 to 1.32V in the V4 datasheet is a mistake. The former is for AVCCAUXTX/RX and the later is only for the VTRX supply.

Ed

Yes you need to power this transceiver as well.

Ed