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Altera_Forum
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10 years ago

EPM2210 state of I/O pins during configuration time of the CPLD upon power up

Regarding the MAX II CPLD family, the EPM2210 CPLD: At power on during the configuration time of the CPLD, what is the default state of all its I/O pins? From the datasheet, i have read that dur...
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Altera_Forum
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10 years ago

You can't change the pull-ups during the download period at power on. Prior to the device being configured all I/O pins will have a weak pull-up enabled.

Once the device has booted with your design you can disable the pull-up. However, you can't add a pull-down internally. As Galfonz says, you'll have to add an external pull-down.

Cheers,

Alex