Altera ACEX1K configuration and initialisation

[Manfred Balik]

I'm using an Altera ACEX1K and can't find the condition of the IO-Pins
during configuration and initialisation of the FPGA ???
Can there be an input on the IO-Pins during configuration and initialisation
???
Especially can there be a clock on GCLK0-Pin during configuration and
initialisation ???
Thanks, Manfred

 

[Martin Thompson]

"Manfred Balik" <e8825130@stud4.tuwien.ac.at> writes:

I'm using an Altera ACEX1K and can't find the condition of the IO-Pins
during configuration and initialisation of the FPGA ???
Can there be an input on the IO-Pins during configuration and initialisation
???
Especially can there be a clock on GCLK0-Pin during configuration and
initialisation ???
Thanks, Manfred

I've had running clocks on a 10KE during configuration without
hassle. The ACEX is very similar as I understand it.

Cheers,
Martin

--
martin.j.thompson@trw.com
TRW Conekt, Solihull, UK
http://www.trw.com/conekt

 

[Rene Tschaggelar]

Manfred Balik wrote:

I'm using an Altera ACEX1K and can't find the condition of the IO-Pins
during configuration and initialisation of the FPGA ???
Can there be an input on the IO-Pins during configuration and
initialisation ?

You shouldn't count on them being pulled up or pulled low.

Especially can there be a clock on GCLK0-Pin during configuration and
initialisation ???

Sure. You could have an smd clock oscillator on board and wouldn't want to
unsolder it just for configuration.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net

 

[Marc Guardiani]

Manfred Balik wrote:

I'm using an Altera ACEX1K and can't find the condition of the IO-Pins
during configuration and initialisation of the FPGA ???
Can there be an input on the IO-Pins during configuration and initialisation
???

Yes, there can be inputs. The ACEX pins are weakly pulled high before
and during initialization.

Especially can there be a clock on GCLK0-Pin during configuration and
initialisation ???

Yes, no problem.