Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

ALtera MAX10 JTAG Problem

Hello, I made some BLDC and IO expander boards based on Altera MAX10, and i have strange problem that from Quartus at first programming after power was supplied, it does not want to program, but s...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

So my idea why it is failing is because of slow ramp for power supply. Now in datasheet it says that ramp time must be faster than tRAMP, but no mention how large tRAMP can be, that is good job altera/Intel.

So by the looks of it, this is what happens:

" If the ramp time, tRAMP, is not met, the MAX 10 device I/O pins and programming registers remain tristated,

during which device configuration could fail."

Question is, how can i overcome this problem, i mean, what should i do to get into programming after i get init fail ? pulling nConfig low does nothing when i get fault condition, only cycling power is letting Altera to boot ( doe to higher ramp speed )