Electronic data processing device with secured memory access

Details Electronic data processing device with secured memory access Electronic data processing device with secured memory access

2004-12-13

2009-06-30

Sough, Hyung S (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S163000, C711S170000

Reexamination Certificate

active

07555617

ABSTRACT:
An electronic data processing device includes a data processing member provided for controlling, based on first and second encoded data, a secured operation initiated by a user, a memory which is configurable in order to delimit at least one secured memory part within that memory, to each secured memory parts there being assigned a dedicated address range. The data processing member includes N (N≧2) processing units of which M (M≦N−1) processing units are provided to process the secured operation and at least one of the remaining N-M processing units is provided for processing application data, to each of the M processing units there is assigned at least one of the secured memory parts via of a configuration element controlled by a selected one of the M processing units. The second memory is provided with a memory access controller provided for controlling access to the second memory. The memory controller is provided for detecting an access request to a protected memory address, belonging to those ranges, when issued by one of a N-M processing units and for overruling a detected protected address.

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patent: 4660168 (1987-04-01), Grant et al.
patent: 7124170 (2006-10-01), Sibert
patent: 2001/0052054 (2001-12-01), Franke et al.
patent: 2003/0018860 (2003-01-01), Krueger
patent: 1601956 (1981-11-01), None

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