SU1144109A1 - Device for polling information channels - Google Patents

Abstract

A device for interrogating information channels containing a memory block, a register, a first counter, two blocks of AND elements, an element, a delay, an NO element, an AND element, and the output group of the first counter is connected to a group of information inputs of a memory block that distinguishes it with In order to simplify the device, the block of OR elements, the second and third counters, the first AND second single vibrators, the pulse generator, the OR element, and the group of outputs of the memory block, are connected to the group of inputs of the register, the group of outputs of which e The group of informational outputs of the device, the group of request inputs of which is connected to the group of inputs of the IL element, the output of which is connected to the input of the first one-vibrator and through the delay element to the input of the second one-oscillator, the output of which is connected to the input of the memory read control of the memory block, the output of the first one-vibrator and output the pulse generator is connected respectively to the first and second inputs of the AND element, the output of which is connected to the counting input of the first counter, whose output group is a group of new outputs of the device, the output of the first one-shot is connected to the counting input of the second counter, with the input (Y) full input of the first block of elements AND, and through the element NOT to the inverse input of the second block of elements AND, the response input of the device is connected to the cMeTHbiMJ input of the third counter, group of outputs of the second and the third counters are connected with input groups 4 4; i pots, respectively, of the first and second blocks of elements I, the output groups of which are connected respectively: with the first and second groups of inputs; coders of an OR block whose output group is connected to a group of address inputs of a memory block.

Description

I

The invention relates to computing and can - be used to control the sequence of services when building various computing devices.

A device for interrogating telemetry channels is known, comprising a counter J two memory blocks, an analysis block, a multiplex S two registers, a key block And a trigger, and two adders flj.

The disadvantage of the device is a large amount of equipment.

The closest in technical essence and the achieved result to the invention is a device for polling information channels containing a counter, two memory blocks, four registers, three adders, two NOT elements, three AND blocks, two AND elements, three comparison circuits and a delay element zj.

A disadvantage of the known device is a large amount of equipment.

The purpose of the invention is to simplify the device.

The goal is achieved by the fact that the device for polling information channels contains a memory block, a register, a first counter; two blocks of elements I. a delay element, an element NOT, an element AND, and the group of outputs of the first counter is connected with a group of information inputs of the memory block, the block of elements OR is entered, the second and third counters, the first and the second one-pulse pulse generator, the element OR, and the group of the outputs of the memory block co.cinen with a group of inputs of the register, the group of outputs of which is a group of information outputs of the device J whose request inputs group is connected to a group of inputs of the OR element, the output of which is connected to the input of the first and a monostable via a delay element - to an input of a second monoflop, whose output is connected to the input of the control read-write memory unit, an output of the first monostable multivibrator. and the output of the pulse generator is connected respectively to the first and second inputs of the element I, the output of which is connected to the counting input of the first counter, whose output group is a group of code outputs of the device, the output of the first one-oscillator is connected to the counting input of W2

inverse counter with inverse input

the first block of elements And and through

,. „

the element is NOT - with the inverse input of the second block of elements And, the response input of the device is connected to the counting input of the third counter, the group of outputs of the second and third counters are connected to groups of inputs from the first and second blocks of elements, respectively, whose output groups are connected to the first and second groups inputs of the block of elements OR., the group of outputs of which is connected to the group of address inputs of the memory block.

The drawing shows a block diagram of the device.

The device contains a memory block 1 register 2, counters 3-5, one-shot 6 and 7, generator 8 pulses, element, NOT 9, element 10, blocks of elements 11 and 12, group of information outputs 13 of the device, group of code outputs 14 of the device , element OR 15 RESPONSE device input 16, device request inputs 17, block of elements OR 18, delay element 19.

The device works as follows.

When the device is turned on, the circuit elements are reset. In all bits of the counters 3-5 of the register 2 is set to zero, the generator 8 is inhibited, the memory device 1 at the zero address generated by the counter 5 records the zero value of the data generated by the counter Z. Starting circuit and setting the device to its initial state in the drawing are shown.

When the device is started up, the blocking is removed from the generator 8, and pulses are sent to the counting input of the counter 3. Counter 3 through a group of outputs 14 and a group of inputs 17 sequentially polls the objects about the presence of the order. If there is an application for service from an object through an OR 15. element, the device receives a signal that triggers one-shot 6 and 7. The first one-shot vibrates 7, It blocks counter 3, the contents of which correspond to the address of the object, affecting And 10 simultaneously switching blocks of AND elements 11 and 12 so that the output of counter 5 is disconnected from

the address input of block 1 and the output of counter 4 are connected to it. Consequently, the information input of block 1 is set to the number accumulated by counter 3, and the address input is zero, because the counting input of counter 4 is not affected and is in its original state. After the time required for the complete transition of element 19 and blocks of elements 11 and 12 to the corresponding states, the one-shot 6 generates a pulse, under the influence of which unit 1 switches from the Read mode to the Write mode, and the object value is entered into it at the zero address The single-oscillator 6 returns to the initial state, transferring the block 1 to the read mode, then the single-oscillator 7 goes to the initial state, which disconnects the output of the counter 4 from the address input of the storage unit 1, unlocks the counter 3 and the trailing edge adds 4 units to the contents of the counter. At exit 5 blo

As 1, the object number value is generated, which is entered into the register 2 and enters the control device (not shown) through the group of outputs 13 of the device after the formation of a gating pulse (gating circuits are not shown). The cycle is repeated, and in block 1 at the first address the value of the number of the next 0 object, which submitted the service, is entered. When the next service request is completed, the impulse is added to the input 16 of the control and the counting input of the counter 5, which adds to the contents of the counter 5 a unit and reads the value stored in block 1,

performed at the first address. I

i Thus, counters 3 and 4 form the service object number and order number of the request, respectively, and counter 5 provides service for the request in order of receipt.

5, the application of the invention allows to simplify the device.

/ J

Claims (1)

DEVICE FOR INTERVIEWING INFORMATION CHANNELS, containing a memory block, a register, a first counter, two blocks of AND elements, an element, a delay, an НО element, an AND element, and the output group of the first counter is connected to the group of information inputs of the memory block, lain with the fact that, in order to simplify the device, an OR block of elements, a second and third counters, a first Hi second one-shot, a pulse generator, an OR element are introduced into it, moreover, the group of outputs of the memory unit is connected to the group of register inputs, group whose outputs is a group of information outputs of the device, the group of request inputs of which is connected to the group of inputs of the OR element, the output of which is connected to the input of the first one-shot and through the delay element to the input of the second one-shot, the output of which is connected to the write control input of the memory block, the output of the first one-shot and the output of the generator pulses are connected respectively to the first and second inputs of the element And, the output of which is connected to the counting input of the first counter, the group of outputs of which is a group of code outputs s of the device, the output of the first one-shot is connected to the counting input of the second counter, with the inverse input of the first block of AND elements and through the element NOT to the inverse input of the second block of AND elements, the response input of the device is connected to the counting input of the third counter, the group of outputs of the second and third counters connected to the input groups of the first and second blocks of AND elements, respectively, the output groups of which are connected respectively to the first and second groups of inputs? Dov block of elements OR, the group of outputs of which is connected to the group of address inputs of the memory block. „SU, ·., 1144109