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Question for download to EPM3256ATC144 via JTAG

Altera_Forum
Honored Contributor II
‎09-29-2011 07:03 AM
981 Views

I want download program to EPM3256ATC144 via JTAG, use USB Blaster in QuartusII. But I found the following problem: 

1) I could ERASE the CPLD successful. 

2) "JTAG Chain Debugger" of QuartusII checked everything is good. 

3) But I could not download to the CPLD, the following will be showed when download via JTAG: 

3.1 Error: Can't access JTAG chain 

3.2 Error: Can't recognize silicon ID for device 1 

4）I get the USERCODE is FFFFFFFF 

I want to know which cause these problem and how to solve it. Thanks
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Altera_Forum
Honored Contributor II
‎09-29-2011 09:24 AM
248 Views

What sort of chip does the Quartus programmer auto-detect the hardware as? "Can't recognise silicon ID suggests that you might have selected the wrong device in Quartus or something like that".

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Altera_Forum
Honored Contributor II
‎09-29-2011 11:59 AM
248 Views

Thanks. The Quartus programmer auto-detect the hardware as EPM3256ATC144 which is the same device I set in the project.  

I can't solve these trouble till now.
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Altera_Forum
Honored Contributor II
‎09-29-2011 05:44 PM
248 Views

If it all matches up then my guess is that you have some sort of noise issue affecting your jtag pins. Sorry I can't be more specific.

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