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Altera_Forum
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16 years ago

EP3C16 and EPCS16 config fail while JTAG mode succeed...

I am using EP3C16Q240C8 , and the configuration device is EPCS16 When I debug my project, I used the JTAG mode, and that's all right. and download to the device EPCS16 is correct which i...
Altera_Forum's avatar
Altera_Forum
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16 years ago

i can confirm that all the configurations pins are wired as they should.

and i changed the MSEL(1) to the VCCA ( 2.5V )

and then i found the same problem

after read the CycloneIII handbook i find that MSEL is powered by VCCINT(1.2V), and my VCCINT is derived from 2.5V ( VCCA ).

and i searched this forum,and i found this topic : http://www.alteraforum.com/forum/showthread.php?t=4168

and it's almost the same ...

but when i changed all the 10K pull ups to 5K , it's not ok..