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Description
This application note discusses storing non-volatile information. Most CPLDs use serial EEPROMs to achieve non-volatile information storage, but MAX® II CPLDs are the only CPLDs that offer User Flash Memory (UFM), which allows a user to store non-volatile information of up to 8 Kbits. In addition to being programmable, the UFM also supports serial and parallel interfaces and other proprietary protocols. This application note explains how you can efficiently store and retrieve information in the UFM and uses the I2C protocol for interfacing and accessing the UFM of a MAX II CPLD.