G - Physics – 07 – F
Patent
G - Physics
07
F
G07F 7/10 (2006.01) G06K 7/00 (2006.01)
Patent
CA 2319768
The invention relates to contact memory cards (16) essentially comprising a memory (10) and its approach circuits (12, 14). The invention is characterized in that the approach circuits of the memory are modified (20) to allow for writing in or reading the memory (10) by means of electrical signals supplied by the terminal (18) in accordance with an asynchronous communication protocol with verification of the integrity of the transmitted codes. The signals received at the contacts (16) are analysed by the circuit (22) and then directed to the address register (26) and data register (28) by the switch circuit (24). The circuit (22) and the control circuit (14) transmit messages and codes to the terminal (18) by way of a transmission circuit (34).
The invention relates to contact memory cards (16) essentially comprising a memory (10) and its approach circuits (12, 14). The invention is characterized in that the approach circuits of the memory are modified (20) to allow for writing in or reading the memory (10) by means of electrical signals supplied by the terminal (18) in accordance with an asynchronous communication protocol with verification of the integrity of the transmitted codes. The signais received at the contacts (16) are analysed by the circuit (22) and then directed to the address register (26) and data register (28) by the switch circuit (24). The circuit (22) and the control circuit (14) transmit messages and codes to the terminal (18) by way of a transmission circuit (34). L'invention concerne les cartes à mémoire à contacts (16) qui comportent essentiellement une mémoire (10) et ses circuits d'accès (12, 14). L'invention réside dans le fait que les circuits d'accès à la mémoire sont modifiés (20) pour permettre l'enregistrement ou la lecture de la mémoire (10) à l'aide de signaux électriques fournis par le terminal (18) selon un protocole de communication du type asynchrone avec vérification de l'intégrité des codes transmis. Les signaux reçus sur les contacts (16) sont analysés par le circuit (22), puis aiguillés vers les registres d'adresse (26) et de données (28) par le circuit d'aiguillage (24). Le circuit (22) et le circuit de contrôle (14) transmettent des messages et des codes au terminal (18) par un circuit de transmission (34).
Cooreman Pascal
Gomez Bertrand
Rayon Stephane
Gemplus
Robic
LandOfFree
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