Access Port Protection for Reconfigurable Scan Networks
Access Port Protection for Reconfigurable Scan Networks
复制标题
可重新配置扫描网络的访问端口保护
DOI:
10.1007/s10836-014-5484-2
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
H.-J. Wunderlich
中科院分区:
文献类型:
--
作者:
R. Baranowski;M.A. Kochte;H.-J. Wunderlich
Scan infrastructures based on IEEE Std. 1149.1 (JTAG), 1500 (SECT), and P1687 (IJTAG) provide a cost-effective access mechanism for test, reconfiguration, and debugging purposes. The improved accessibility of on-chip instruments, however, poses a serious threat to system safety and security. While state-of-the-art protection methods for scan architectures compliant with JTAG and SECT are very effective, most of these techniques face scalability issues in reconfigurable scan networks allowed by the upcoming IJTAG standard. This paper describes a scalable solution for multi-level access management in reconfigurable scan networks. The access to protected instruments is restricted locally at the interface to the network. The access restriction is realized by asequence filterthat allows only a precomputed set of scan-in access sequences. This approach does not require any modification of the scan architecture and causes no access time penalty. Therefore, it is well suited for core-based designs with hard macros and 3D integrated circuits. Experimental results for complex reconfigurable scan networks show that the area overhead depends primarily on the number of allowed accesses, and is marginal even if this number exceeds the count of registers in the network.
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DOI:
--
发表时间:
2012
期刊:
2012 IEEE International Test Conference
影响因子:
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作者:
R. Baranowski;M. Kochte;H. Wunderlich
通讯作者:
H. Wunderlich
DOI:
10.1109/vts.2011.5783765
发表时间:
2011
期刊:
29th VLSI Test Symposium
影响因子:
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作者:
Kurt Rosenfeld;R. Karri
通讯作者:
R. Karri
DOI:
10.1109/test.2013.6651903
发表时间:
2013
期刊:
2013 IEEE International Test Conference (ITC)
影响因子:
--
作者:
Jennifer Dworak;A. Crouch;John C. Potter;Adam Zygmontowicz;Micah Thornton
通讯作者:
Micah Thornton
DOI:
10.18419/opus-3246
发表时间:
2014
期刊:
--
影响因子:
--
作者:
R. Baranowski
通讯作者:
R. Baranowski
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
N. Stollon
通讯作者:
N. Stollon