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Altera_Forum's avatar
Altera_Forum
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16 years ago

When Do MSEL pins become valid

A question, which In could not answer from the lit so far: Does it make any difference, if the MSEL pins are driven by a host to be free of the type of loading procedure? Will there be a power ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

You don't refer to a particular device. In the Cyclone 3 handbook, I don't see a hint, that MSEL can be controlled dynamically. In contrast, there are many warnings that suggest to hardwire the pins. It's not explicitely said, when MSEL is read respectively latched, but I would rather expect at POR (after VCCA and VCCINT reach the specified level).

It's also said, that nCE must be driven low to use JTAG configuration.