Hi,
I plan to use a Cyclone V FPGA in combination with a LPDDR2 RAM from Micron.
The Cyclone V FPGA needs 1.07V .. 1.13V for the core, and 1.14V .. 1.26V for the 1.2V-IO-Pins.
The Micron RAM needs nearly the same voltage (1.14 .. 1.30V) for it's 1.2V logic IO and core.
I don't use the FPGA at the highest possible switching speeds, that applies to the RAM, too. Used fmax is 200MHz.
(a) What effects do I have to consider if I power the FPGA core with 1.2V instead of 1.1V to save one voltage regulator? (BTW: 1.2V is far away from the absolute maximum rating of 1.43V...)
(b) What effects do I have to consider if I drive the 1.2V IO pins with 1.1V VCCIO? (I'am using 1.2V HSUL voltage referenced IO standard, and VREF will be scaled down to fit 0.5xVCCIO).
I plan to use a Cyclone V FPGA in combination with a LPDDR2 RAM from Micron.
The Cyclone V FPGA needs 1.07V .. 1.13V for the core, and 1.14V .. 1.26V for the 1.2V-IO-Pins.
The Micron RAM needs nearly the same voltage (1.14 .. 1.30V) for it's 1.2V logic IO and core.
I don't use the FPGA at the highest possible switching speeds, that applies to the RAM, too. Used fmax is 200MHz.
(a) What effects do I have to consider if I power the FPGA core with 1.2V instead of 1.1V to save one voltage regulator? (BTW: 1.2V is far away from the absolute maximum rating of 1.43V...)
(b) What effects do I have to consider if I drive the 1.2V IO pins with 1.1V VCCIO? (I'am using 1.2V HSUL voltage referenced IO standard, and VREF will be scaled down to fit 0.5xVCCIO).