SU1497637A1 - Device for regeneration of dynamic memory - Google Patents

Abstract

The invention relates to dynamic memory devices and can be used to transfer data in automation and computing devices with synchronous random-sequential sampling. The purpose of the invention is to increase speed. The device contains a switch, two registers, a comparator, a trigger, address and control inputs and outputs. The trigger sets the device operation mode. In the first register, the last lower-case address of the external reference in the current regeneration period is stored, in the second register the address of the last reference in the previous period. The addresses regenerated in the current regeneration period are excluded from the regeneration cycle. 1 il.

Description

The invention relates to memory devices and can be used for transmitting data in devices of automation and computer technology with synchronous random sampling.

The purpose of the invention is to increase the speed of the device.

The drawing shows a functional diagram of the proposed device.

The device contains a switch 1, first register 2, counter 3, second register 4, comparison block 5, trigger 6 address inputs 7 and outputs 8, input 9 of address write pulses, input 10 of regeneration pulses, reset input 11, regeneration input 12 and output 13 mode.

Input 7 receives the lowercase addresses of external calls, and input 9 receives their gates.

The device works as follows.

After supplying the supply voltage, the registers and the counter are set arbitrarily, and in order to transfer the dynamic memory to normal operation, it is necessary to perform several regeneration cycles. For input II to register 4 and input 12 to trigger 6, reset pulses are given. The device is set to regener mode. By zero I state of the trigger 6, the switch I blocks the supply of installation signals

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nl counter 3 and parte rtagt receipt n its c4CTi (bii i input rgronsrltsii pulses from input 10. Counter 3 nachipnst generate line addresses, which from output 8 arrive at address buses. When the counter is set to zero, comparison unit 5 generates a pulse, which by its falling edge sets the trigger 6 and the device is transferred to the external circulation mode, which is determined by the state of output 13. The operation is repeated until the dynamic memory is switched to the normal operation mode.

In the external access mode, the switch I blocks the arrival of regeneration pulses and allows the external address signals to be detected at inputs 9. Using them, the external address addresses are entered into register 2 and counter 3 and output from the latter to address buses.

After the regeneration period Tjgp expires from input 12, a reset trigger pulse 6 is received. The device is switched to the regeneration mode, the next Tgjp begins. With the start of the regeneration cycle, the last line address received in the previous one (i-volume) is stored in register 2 and counter 3. In this case, the register A is stored And ;,.

With the arrival of regeneration pulses on the counting input of counter 3, it begins to generate lower-case addresses, starting with L ;. When the state of the counter coincides with the value A, -., The block 5 generates a pulse, according to which the value of Ai is rewritten in the second register 4 and the trigger 6 is set, the next external circulation begins, at the end of which the first register 2 and counter 3 are reset. sitts A;,. The condition for regeneration is max f

TREF voKc is the maximum allowable regeneration period and memory load time.

Thus, addresses from which the external calls were made in the current are excluded from the regeneration cycle, which reduces the duration of this cycle and thereby increases the speed of the device.

Formula of Invention

A device for regenerating a dynamic memory containing a switch, a first register and a counter, whose outputs are device address outputs, the information inputs of the meter are device address inputs and are connected to the information inputs of the first register, the synchronous input of which is connected to the first output the switch and the installation of the counter, with the input of which is connected to the second input of the switch, the first and second information inputs of which are respectively the input of address write pulses and input House of device regeneration pulses, characterized in that, in order to increase the device speed, it contains a second register, a comparison unit and a trigger, the output of which is the device mode output and connected to the control input of the switch, the trigger reset input is the device regeneration input, the trigger setup input is connected to the output of the comparison unit and the synchronous input of the second register, the reset input of which is the corresponding input of the device, the outputs of the second register are connected to the inputs of the first group of the block On a comparison, the inputs of the second group of which are connected to the outputs of the counter, the outputs of the first register are connected to the information inputs of the second register.

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Claims (1)

The invention is a device for the regeneration of dynamic memory, containing a switch, a first register and a counter, the outputs of which are the address outputs of the device, the information inputs of the counter are the address inputs of the device and are connected to the information inputs of the first register, the sync input of which is connected to the first output of the switch and the input of the counter setup whose estimated input is connected to the second input of the switch, the first and second information inputs of which are respectively the pulse input for isi of addresses and the input of the regeneration pulses of the device, characterized in that, with the purpose of increasing the device’s speed, it contains a second register, a comparison unit and a trigger, the output of which is the output of the device mode and connected to the control input of the switch, the trigger reset input is the regeneration input of the device , the trigger installation input is connected to the output of the comparison unit and the sync input of the second register, the reset input of which is the corresponding input of the device, the outputs of the second register are connected to the inputs of rvoy group comparison block, the inputs of the second group which are connected to the outputs of the counter, the first register outputs are connected to data inputs of the second register.