Forum Discussion

Honored Contributor

14 years ago

Impossible to configure Cyclone III with JTAG

Hello, I have a problem with Cyclone III EP3C25F324 device programming. I'am using a board with 1 cyclone III, a EPCS128 device and a PC28F128P30BF65E flash. Flash Ram is not connected to th...

Altera_Forum

Honored Contributor

14 years ago

Hi,

I've checked JTAG signals with a scope.

TDI, TDO, TMS have a good 2.5V High level.

But TCK have a 2.5V/100ns overshoot before a 1.5V high level. But toggle correctly.

(see picture).

https://picasaweb.google.com/109130808728084231321/7Octobre201102?authuser=0&feat=directlink

Forum Discussion

Impossible to configure Cyclone III with JTAG

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