GB2260431B - Data security arrangements for semiconductor programmable logic devices - Google Patents

Data security arrangements for semiconductor programmable logic devices

Info

Publication number
GB2260431B
GB2260431B GB9220584A GB9220584A GB2260431B GB 2260431 B GB2260431 B GB 2260431B GB 9220584 A GB9220584 A GB 9220584A GB 9220584 A GB9220584 A GB 9220584A GB 2260431 B GB2260431 B GB 2260431B
Authority
GB
United Kingdom
Prior art keywords
programmable logic
logic devices
data security
security arrangements
semiconductor programmable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9220584A
Other versions
GB2260431A (en
GB9220584D0 (en
Inventor
Kenneth Austin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilkington Micro-Electronics Ltd
Original Assignee
Pilkington Micro-Electronics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GB9121591A priority Critical patent/GB9121591D0/en
Application filed by Pilkington Micro-Electronics Ltd filed Critical Pilkington Micro-Electronics Ltd
Priority to GB9220584A priority patent/GB2260431B/en
Publication of GB9220584D0 publication Critical patent/GB9220584D0/en
Publication of GB2260431A publication Critical patent/GB2260431A/en
Application granted granted Critical
Publication of GB2260431B publication Critical patent/GB2260431B/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • G11C16/02Erasable programmable read-only memories electrically programmable
    • G11C16/06Auxiliary circuits, e.g. for writing into memory
    • G11C16/22Safety or protection circuits preventing unauthorised or accidental access to memory cells
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14Protection against unauthorised use of memory or access to memory
    • G06F12/1408Protection against unauthorised use of memory or access to memory by using cryptography
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/71Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
    • G06F21/75Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C7/00Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/24Memory cell safety or protection circuits, e.g. arrangements for preventing inadvertent reading or writing; Status cells; Test cells
GB9220584A 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices Expired - Fee Related GB2260431B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9121591A GB9121591D0 (en) 1991-10-11 1991-10-11 Data security arrangement for semiconductor programmable logic devices
GB9220584A GB2260431B (en) 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9220584A GB2260431B (en) 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices

Publications (3)

Publication Number Publication Date
GB9220584D0 GB9220584D0 (en) 1992-11-11
GB2260431A GB2260431A (en) 1993-04-14
GB2260431B true GB2260431B (en) 1995-06-14

Family

ID=26299678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9220584A Expired - Fee Related GB2260431B (en) 1991-10-11 1992-09-30 Data security arrangements for semiconductor programmable logic devices

Country Status (1)

Country Link
GB (1) GB2260431B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8051303B2 (en) * 2002-06-10 2011-11-01 Hewlett-Packard Development Company, L.P. Secure read and write access to configuration registers in computer devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114522A2 (en) * 1982-12-27 1984-08-01 Synertek Inc. ROM protection device
EP0162707A2 (en) * 1984-05-22 1985-11-27 American Microsystems, Incorporated ROM protection scheme
US5007082A (en) * 1988-08-03 1991-04-09 Kelly Services, Inc. Computer software encryption apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114522A2 (en) * 1982-12-27 1984-08-01 Synertek Inc. ROM protection device
EP0162707A2 (en) * 1984-05-22 1985-11-27 American Microsystems, Incorporated ROM protection scheme
US5007082A (en) * 1988-08-03 1991-04-09 Kelly Services, Inc. Computer software encryption apparatus

Also Published As

Publication number Publication date
GB2260431A (en) 1993-04-14
GB9220584D0 (en) 1992-11-11

Similar Documents

Publication Publication Date Title
GB2312065B (en) Programmable logic array integrated circuit devices
GB2251703B (en) Valve devices
GB2279790B (en) A programmable logic device
KR960008517B1 (en) Semiconductor device and the manufacturing method
GB2300950B (en) Programmable logic array integrated circuit devices
KR960013039B1 (en) Semiconductor memory device and manufacturing thereof
GB2264578B (en) Nonvolatile semiconductor memory device
KR960013038B1 (en) Non-volatile semiconductor device allowing high density integration
GB2265233B (en) Fifo memory devices
KR970005695B1 (en) Semiconductor device
KR960009248B1 (en) Clock-synchronous semiconductor memory device and the access method thereof
GB2297409B (en) Programmable logic devices
KR970005687B1 (en) Semiconductor wafer
SG46582A1 (en) 10-Desacetoxytaxol derivatives
EP0463623A3 (en) Nonvolatile semiconductor memory circuit
EP0517354A3 (en) Semiconductor memory circuit having a test logic circuit structure
GB9413816D0 (en) Wafer scale architecture for programmable logic
EP0649259A3 (en) Data reproducing devices.
KR930009541B1 (en) Semiconductor memory device
IN170397B (en) Process for fabbricating semiconductor devices
EP0512543A3 (en) Electronic tag
SG55046A1 (en) Architecture and interconnect scheme for programmable logic circuits
GR3031238T3 (en) Device for processing data packets
EP0639859A3 (en) Vertical chip mount memory package and method.
EP0317287A3 (en) Programmable logic device

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010930