System and method for protecting data stored in the control registers of an integrated circuit

The present invention provides a system and method for protecting data stored in the control registers of an integrated circuit, such as a television chip. The system and method use one or more selectively activated read protection modules to prevent the control registers from being read unless a pr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Jiang, Jiande, Liu, Zheng
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention provides a system and method for protecting data stored in the control registers of an integrated circuit, such as a television chip. The system and method use one or more selectively activated read protection modules to prevent the control registers from being read unless a predetermined key or password is entered. The password or key may be stored in password registers within the chip. A key access generator will enable read access of the control registers if correct values are written to the appropriate password registers. The key access generator may enable read access for a predetermined period of time or until it receives another input.