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Arria 10 power-up sequnce: Can I combine Vccpgm with Group 2?


I'm setting power-up sequence for Arria-10 in a new board. As it is written in Intel's specification "AN 692: Power Sequencing Considerations for Intel® Cyclone® 10 GX, Intel® Arria® 10, and Intel® Stratix® 10 Devices", group 3 ramp-up and group 2 ramp-up can be combined "if the two groups share the same voltage level and the same voltage regulator as Group 2 power rails VCCIO, VCCPGM, and VCCIO_HPS".


In my board, VCCIO is supperated to different voltage levels (1.2v, 1.8v, 3v). VCCIO_HPS is not used.


My question is, can I combine the ramp-up of VCCPGM and the 1.8v of VCCIO with group 2, and ramp the rest of the VCCIOs (1.2v, 3.0v) as group 3? Or, do I have to ramp VCCPGM and the 1.8v-VCCIO with group 3?

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Hi Ben, You can ramp-up VCCPGM and VCCIO (1.8V) with group 2 if they are using the same voltage regulator with same voltage level. Regards, YL