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Altera_Forum
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20 years ago

IDE, Serial Loader programming problems

We are using this board: Custom board with EP2C8 device and EPCS16 serial loader Micron 16 meg SDRAM VGA output with custom verilog controller which uses SDRAM for VRAM EPCS controller, JTAG...
Altera_Forum's avatar
Altera_Forum
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20 years ago

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originally posted by pfab@Feb 20 2006, 01:39 AM

hi rhaik,

are you using serial resistors on your jtag signals?

we had to add 47 ohm serial resistors to the jtag signals on one of our custom boards in order to get the jtag interface to work properly.

--wolfgang

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Well, we tested this with the ByteBlaster II, which has slower JTAG signals than the USB Blaster, and it worked. We therefore think that we have some speed issues with the JTAG, and the hardware guy thinks we might be able to fix it by adding caps.

Anyway, so now that our JTAG works OK, we narrowed down the cause of the running code problem.

Our SDRAM isn&#39;t working right. I&#39;m going to take the discussion over to this thread (http://forum.niosforum.com/forum/index.php?showtopic=3283).