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Altera_Forum
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18 years ago

MAX II PFL conflicting with other virtual jtag instances?

Hello, I have a MAX II acting as mutiple FPGA configuration controller, based on the Parallel Flash Loader Megafunction. When other virtual jtag instances e. g. altsource_probe are added to the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hello,

Altera support sais:

--- Quote Start ---

The Quartus II software doesn't support multiple JTAG instance nodes. It causes the issue that you cannot use the PFL and signal probes together on Max II. This issue will be fixed in Quartus II 8.

--- Quote End ---

This should be read to my opinion as "Quartus programmer doesn't support..", cause some combinations of virtual JTAG instances apparently can be used. In the meantime, I could see that the Quartus programmer fails when it "forgets" to count additional instances n_sel_bits in virtual_ir_shift, although it knows the correct virtual ir length during initial node configuration intentify. So hopefully, the issue exists only with Quartus programmer PFL operation.

Regards,

Frank