Debugging port security interface

Details Debugging port security interface Debugging port security interface

2005-02-04

2008-12-02

Nguyen, Minh Dieu (Department: 2137)

Information security

Prevention of unauthorized use of data including prevention...

Access control

C726S002000, C713S183000, C713S189000, C711S163000, C711S164000

Reexamination Certificate

active

07461407

ABSTRACT:
The present invention provides a secure JTAG interface to an application-specific integrated circuit (ASIC). In the preferred embodiment the invention operates through the combined efforts of a Security Module (SM) comprising a state machine that controls the security modes for the ASIC, and a Test Control Module (TCM) which contains the JTAG interface. The TCM operates in either a restricted mode or an unrestricted mode, depending on the state of the SM state machine. In a restricted mode, only limited access to memory content is permitted. In an unrestricted mode, full access to memory content is permitted.

REFERENCES:
patent: 4907268 (1990-03-01), Bosen et al.
patent: 5889866 (1999-03-01), Cyras et al.
patent: 6243809 (2001-06-01), Gibbons et al.
patent: 6480097 (2002-11-01), Zinsky et al.
patent: 6510522 (2003-01-01), Heinrich et al.
patent: 6622184 (2003-09-01), Tabe et al.
patent: 6986050 (2006-01-01), Hypponen
patent: 7124301 (2006-10-01), Uchida
patent: 7185161 (2007-02-01), Kang
patent: 7284132 (2007-10-01), Nakabe et al.
patent: 2003/0005335 (2003-01-01), Watanabe
patent: 2003/0014653 (2003-01-01), Moller et al.
patent: 2003/0177373 (2003-09-01), Moyer et al.
patent: 2003/0212897 (2003-11-01), Dickerson et al.
patent: 2003/0226025 (2003-12-01), Lin et al.
patent: 2005/0091520 (2005-04-01), Khan et al.
patent: WO 01/57627 (2001-09-01), None
patent: WO 03/081400 (2003-10-01), None

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