Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Altera MAX-II EPM240 pullup's

Status
Not open for further replies.

Bingo600

Full Member level 5
Joined
Aug 26, 2004
Messages
267
Helped
19
Reputation
38
Reaction score
6
Trophy points
1,298
Location
Cyberspace
Activity points
2,439
Hi Altera Gurus

I have a question about the pullup's on a MAXII EPM240T100C5 CPLD.

I'm a VHDL beginner just started this summer.

I'm using Quartus-II 13.0sp1 ,and have enabled pullup's om my cpld input pins in the Assignment editor.
I'm getting no errors (with respect to pullups) when building the project.

I have switched "weak pullup resistor off" in the "global fitter" (it shows on) , as i found the Assignmet editor way of selecting individual pins.


But somehow i'm not trusting the cpld to be able to switch on pullups on a selective base.

Is it just me or does it really work with individual pin pullups ?

The PU's are not visible in the RTL schematic or anywhere i can find.

Thanx for any help

/Bingo

Ohh: I'm doing this one for my Odroid U3
https://forum.odroid.com/viewtopic.php?f=80&t=11888
 

Attachments

  • Quartus-assignment.editor-weak-pullup.png
    Quartus-assignment.editor-weak-pullup.png
    118 KB · Views: 1
  • Quartus-fitter-pu.png
    Quartus-fitter-pu.png
    117.3 KB · Views: 2

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,266
Helped
14,224
Reputation
28,709
Reaction score
12,917
Trophy points
1,393
Location
Bochum, Germany
Activity points
279,523
But somehow i'm not trusting the cpld to be able to switch on pullups on a selective base.
Doesn't sound actually like a technical problem...

The PU's are not visible in the RTL schematic or anywhere i can find.
Don't believe that you searched thoroughly. There's e.g. the report Fitter/Resource Section/Input Pins
 

Bingo600

Full Member level 5
Joined
Aug 26, 2004
Messages
267
Helped
19
Reputation
38
Reaction score
6
Trophy points
1,298
Location
Cyberspace
Activity points
2,439
It's not a technical problem , just a question if selective pullups works om the MAX-II
And where to verify it ?

/Bingo

- - - Updated - - -

Ohh i think i found it in the fit.rpt

Thanx for the hint FvM

I suppose i have to trust that one.

/Bingo
 

Attachments

  • gz_16o8i.fit.rpt.zip
    8.1 KB · Views: 0

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top