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Altera_Forum
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11 years ago

Flex10K and EPC2 configuration Error - Flex10K in continuous Configuration loop.

Hi All, I am new to Altera. I have a board with Flex10k30 and an EPC2 to configure it. I also have a DSP (ASDP21060) on the board which uses Flex 10k. I have recently run into an error in...
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Altera_Forum
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11 years ago

Hi Dave,

You told me to pull down the nCONFIG. But when I checked the nCONFIG was already low. I checked it again now. The situation when in the loop is

1) nSTATUS -- toggling as per the pic I uploaded.

2) continuous DCLK, DATA0

3) nCONFIG --- Low

4) CNF_DONE -- Low

I made a mistake in driving the CNF_DONE high which I will not do again. I am using the nINIT_CONF pin on the EPC2. The configuration handbook says I need not use an external pull up resistor (there is a provision for it on the card) if I am using nINIT_CONF and the internal pull up resistors.

could you tell me why such a situation occurred. There is a mention of JTAG's initialize configuration instruction, but when booting for EPC2, that should not be an issue. Does EPC2 use the nINIT_CONF pin when booting?

Thanks,

C Pemmaraju