Honored Contributor1. Power for VCCINT and some bank are applied at first while other bank has no power. Power for other bank are applied at a later time?
2. Apply different VCCIO voltage as the voltage specified in Quartus IO standard setting(all LVTTL, but with different voltage)? Thanks! I think some IO shifter would use in this way.
Honored ContributorReview the MAX II Device Handbook, particularly chapter 4 hot socketing and power-on reset in max ii devices
--- Quote Start --- All VCCINT and VCCIO pins of all banks must be powered on MAX II devices before entering user mode. --- Quote End ---Honored Contributorthanks!
i have read the handbook, i think it's possible to Question 1, as long as I can accept the device don't enter user mode while some bank has no power. what about question 2: if i set some pin to 1.8V in quartus, and apply 3.3V to VCCIO, will that pin work as a 3.3V LVTTL pin?Honored ContributorI don't understand what you want to achieve with assigning a different IO-voltage. The assigned voltage has no meaning but relating different mA numbers to low and high current strength. It has no impact on the configuration programmed to the device. Low and high current strength is the only possible variation for MAX II.
Honored Contributortake the level-shifter in usb-balster for example: one side of the shifter is supplied by the power derived from usb, which is always avaliable.
the other side of the shifter is powerd by the target board, which is available only when connect to target board. and the voltage from the target board can vary from 3.3V to 1.2V. that's what i want the max-ii to do. according to your reply, this is also possible. thanks
