byte addressablearray that has been optimized for the storage offrequently changing information (e.g., programvariables or other data that are updated often).frequently changing values will typically be updatedmore often than specifications d120 or d120a. if this isnot the case, an array refresh must be performed. forthis reason, variables that change infrequently (such asconstants, ids, calibration, etc.) should be stored inflash program memory. 数据 eeprom 是高耐久性、针对频繁变动信息（例如，程序变量或其它经常更新的数据）的存储而优化的字节
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