SU333605A1 - STORAGE DEVICE? ^ UNION R'f "- <- ;;? T - ': n''fi' ^ vv /" tJli .4 i \ М i bd -11. L "I sir" lt "flECHABLETEN - Google Patents

Description

A memory device (RAM) is known, which contains a random access memory connected through a playback unit to a number register, an information accuracy control unit.

A disadvantage of the known memory is that, upon detection of a failure in the reading circuit, the memory cannot be used and needs repair.

The proposed memory is different from the fact that the number register is made on triggers with counting inputs to which the output of the information accuracy control block is connected.

Such differences make it possible to increase the reliability of the device by making it possible to correct the failures that occur in the reading chains.

The functional diagram of the described memory is shown in the drawing.

The memory contains a dynamic storage unit 1, a recording unit 2 and 3 playbacks, a number 4 register, a code issuing unit 5, a numerical highway 6, an information control unit 7 with output 8 a control unit 9 with outputs 10, 11, 12.

Dami The input of the control unit 7 is connected to the outputs of the register of the number 4, and its output 8 is fed to the input of the control unit 9 and to the counting inputs of the triggers of the register of the number 4. The operation of the charger is conveniently described in the following example. Let the bit size of the numbers stored in the memory be four, and the information be monitored for the parity of the number of units in the number (i.e., an additional parity feature is provided).

Consider the process of reading the number 01010, i.e., the number 0101 with the parity sign equal to zero.

When the reading mode is implemented, a control signal is supplied to the control input of the playback unit 3 from the output 11 of the control unit 9, and the information is taken to the register of the number 4. If during the reading process

If the errors do not occur (which is fixed by the parity checker 7), then by the enabling signals appearing at the outputs 12 and 10 of the control unit 9, the number from the register 4 through the output block 5 will go to the numerical magic all time zero is given ).

Then the number in the memory is -01010, and in register 4 the number is -01000.

Since the parity attribute does not correspond to the number of units in the number, the error will be fixed by the control unit 7,

By the signal of unreliability of information arising at the output 8 of the control unit 7, the control unit 9 is switched to the correction assurance mode, while at its output 12 the code output signal does not appear.

In the correction mode, the signal from the output 8 of the control unit 7 to the counting inputs of the flip-flop register 4 inverts the inverted code, and the signals appearing at the outputs 10 and // of the control unit 9 are provided (using unit 2 recording and 3 playback) the regeneration of information in the drive ./ and its re-reading. In this case, the number 01010 changes as follows: 01000 (in the register of the number 4, 10111 (after inversion), 10111 (in the cell) and 10101 (again in the register of the number 4).

Since the parity feature again does not correspond to the number of units in the number, at the output 8 of the control unit 7, a signal appears again, which, as in the previous case, inverts the code (as it goes to the counting inputs of the number 4 trigger register) and translates the control unit to mode

final recovery (regeneration) and information output (in this case signals are generated at outputs 10 and 12, arriving at the control inputs of recording unit 2 and output 5). In this case, the number 01010 chosen by us for the example undergoes the following changes: 10101 (IB register number 4), 01010 (after inversion), 01010 (in the memory cell and the number line 6).

It is easy to see that due to the systematic nature of the failure, the error has been eliminated. The memory is restored (and also issued to the numerical highway) information is correct. 2. There is a crash. Error similar

this is fixed by the control unit 7, the inverting and re-reading of information is realized. A sign of the presence of a fault (rather than a failure) is the absence of a signal at the output 8 of the control unit 7, etc., for repeated reading.

Subject invention

A storage device containing an online drive connected via

the playback unit to the number register, the information reliability control unit connected to the control unit, characterized in that, in order to increase the reliability of the device, the number register is made on triggers with counting inputs to which the output of the information reliability control unit is connected.

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