Method and apparatus for selecting an operating mode in an integrated circuit

摘要

The device has a ROM (10) storing a preset value composed of data words. A non-volatile programmable memory (12) is controlled for storing the preset value. A comparator (16) indicates how many data words of the value stored in memory (12) are similar to the words stored in ROM. A control unit (18) inactivates an operation mode selection signal when the number of similar words is greater than a preset threshold. Independent claims are also included for the following: (a) an integrated circuit (b) a selection process for operation mode of an integrated circuit between a stand by mode and a slave mode.