Forum Discussion

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

Vi and VCCIO

hello, I am just starting designs with Altera devices and I hope my question will be easy to answer. 1. VCCIO is just a supply power for input and output buffers of the device. 2. If ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

A couple of weeks ago, I tried to find some GPIOs on the NEEK ...

alteraforum --> /forum/showthread.php?t=19529

(sorry I'm not allowed to post links yet :( please copy & paste to see the thread ... )

I know, there is a new version (v2.0) of the neek available which has ~10 GPIOs but I'm wokring on the old one.

As I could not find any pin without a resistor or capacity in series or parallel I decided to layout an own PCB. I now have a PCB in between the Starter Kit and the HSMC cable. That board works far better than expected.

Now I have direct access to the pins:

N15, N16, H16, H15, C1, C2, T16, R16, F18 (only input), F17 (only input) L3, L4

I just found out, that it is not a real big problem not to have the 3,3 V. The background:

I'm triing to realise an SPI communication to a microcontroller which runs at 3,3 V. Today I found out that with more that 2,0 V this microcontroller detects the signal as high. As I will not use this setup in critical environments my 2,5 V should be enough.

Anyway, If you have an idea how to get the pins running at 3,3 V please tell me. Might be a better solution.

Leo.