EP 1031072 A1 20000830 - MICROCONTROLLER HAVING ALLOCATION CIRCUITRY TO SELECTIVELY ALLOCATE AND/OR HIDE PORTIONS OF A PROGRAM MEMORY ADDRESS SPACE
Title (en)
MICROCONTROLLER HAVING ALLOCATION CIRCUITRY TO SELECTIVELY ALLOCATE AND/OR HIDE PORTIONS OF A PROGRAM MEMORY ADDRESS SPACE
Title (de)
MIKROKONTROLLE MIT ZUORDNUNGSSCHALTUNG ZUM SELEKTIVEN ZUORDNEN UND/ODER VERDECKEN VON TEILEN EINES PROGRAMMSPEICHERKERNRAUMS
Title (fr)
MICROREGISSEUR COMPORTANT DES CIRCUITS D'ATTRIBUTION POUR ATTRIBUER ET/OU CACHER DE MANIERE SELECTIVE DES PARTIES D'UN ESPACE D'ADRESSE MEMOIRE DE PROGRAMME
Publication
Application
Priority
- US 9918443 W 19990813
- US 13424298 A 19980814
- US 13541098 A 19980814
Abstract (en)
[origin: WO0010074A1] A microcontroller system (104) includes program memory space allocation circuitry (104). In a first mode of operation, a first block of program memory (102a) is hidden for code fetching such that a processor is prohibited from retrieving program instructions from the first block of program memory (102a). In a second mode, however, the first block of program memory (102a) is accessible for code fetching. In a third mode of operation, the program memory space allocation means allocates the program memory space such that the processor (103) may retrieve program instructions only from an external memory, that is not unitarily formed in the integrated circuit. In some embodiments, the mode of operation of the program memory space allocation is controlled in response to the contents of a configuration register (106). By having circuitry to so allocate the program memory, the security of the program memory (102) is enhanced.
IPC 1-7
IPC 8 full level
CPC (source: EP)
G06F 9/3802 (2013.01); G06F 9/3814 (2013.01)
Citation (search report)
See references of WO 0010074A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
US 9918443 W 19990813; EP 99942170 A 19990813