Electronically configurable connection device
First Claim
Patent Images
1. An electronic connection device to connect a peripheral unit which includes a microprocessor through a bus to a central processing unit, said device comprisingan EEPROM-type memory memorizing a logic state which defines an access address of the peripheral unit;
- said memory being connected to be programmed by the microprocessor of this peripheral unit,wherein said memory is connected to an automatic starting-up circuit which is connected and configured to read the logic state of said memory as soon as power is applied to the peripheral unit, andwherein the device includes a writing selection circuit for the selection, in writing mode, of said memory, said writing selection circuit being addressable by said central processing unit through said bus; and
wherein the memory is connected, firstly, to a set of flip-flop circuits and, secondly, to an end-of-reading circuit to prevent the deterioration of the memory.
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Abstract
The use of electromechanical devices for the configuration of the address for access to a peripheral unit in a data-processing system is avoided by replacing them with a non-volatile EEPROM-type memory. The dam in non-volatile memory is read as soon as the peripheral unit is put into operation, and the information that it delivers is stored in volatile memory and used as a comparison address to validate the operation of the peripheral unit.
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14 Claims
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1. An electronic connection device to connect a peripheral unit which includes a microprocessor through a bus to a central processing unit, said device comprising
an EEPROM-type memory memorizing a logic state which defines an access address of the peripheral unit; -
said memory being connected to be programmed by the microprocessor of this peripheral unit, wherein said memory is connected to an automatic starting-up circuit which is connected and configured to read the logic state of said memory as soon as power is applied to the peripheral unit, and wherein the device includes a writing selection circuit for the selection, in writing mode, of said memory, said writing selection circuit being addressable by said central processing unit through said bus; and wherein the memory is connected, firstly, to a set of flip-flop circuits and, secondly, to an end-of-reading circuit to prevent the deterioration of the memory. - View Dependent Claims (2)
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3. An electronic connection device to connect a peripheral unit through a bus to a central processing unit, said device being mountable on the peripheral unit and comprising
a plurality of non-volatile memory cells for electronically memorizing a logic state which defines an access address of said peripheral unit, a plurality of volatile memory cells operatively connected to automatically copy the logic state of said non-volatile memory cells whenever power is applied to the peripheral unit after a power-down condition, said volatile memory cells being connected to a validation circuit which is configured to compare the logic state of said volatile memory cells with an address transmitted to said validation circuit from said central processing unit and to produce a validation signal when the logic state of said volatile memory cells is the same as the transmitted address, to thereby provide access from the central processing unit to said peripheral unit through said bus upon the occurrence of said validation signal.
Specification