SU1499344A1 - Multichannel priority device - Google Patents

Abstract

The invention relates to computing and can be used to organize the access of several subscribers to a single resource. The purpose of the invention is to reduce the amount of equipment of the device. The multichannel priority device contains M-channels 1, the element NOT 2, the one-shot 3, the element OR 4, and each channel contains the trigger 5, the delay elements 6-8, the elements 9-12, the elements NOT 13,14, the one-shot 15, the element OR 16, a capture request 17 input for a trunk, an output 18 for confirming a trunk acquisition, information outputs 19, information inputs 20, inputs 21-23, and outputs 24-26 of the channel. The device allows the polling signal to pass in both directions along one of the data lines, which makes it possible not to use two special lines to pass the polling signal in the device. 1 il.

Description

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The invention relates to the field of computing technology, in particular, to priority devices, and can be used to organize access from several subscribers to a common resource, in particular to a common highway.

The purpose of the invention is to reduce the amount of equipment of the device.

The drawing shows the functional diagram of the device.

The device contains M channels 1, before the first channel the device contains a HE 2 element, a one-shot 3, a SHSh 4 element and in each of the M channels 1 a trigger 5, delay elements 6-8, elements 9-12, HE elements 13 and 14, one-shot 15, element OR 16, input 17 of the request to capture the trunk line, output 18 confirming the capture of the trunk highway, k + 1 information outputs 19, k + 1 information inputs 20, first (kl) -e inputs 21 of the device, second third inputs 22 and 23 of the device, the first () -e outputs 24 of the device, the second, third outputs 25 and 26 of the device.

Device Works as follows.

In the initial state, the trigger 5 of all channels is at zero. When the device is turned on in the single-vibrator 3 code, a pulse appears, which through the OR 4 element transcends as a polling pulse to the second input 22 of the device of the first channel. In the absence of a request in the channel (low potential at the input 17 of the channel request), the polling pulse passes through the channel as follows: through delay element 6, element 9, element lm 16 to the second input 25 of the device and so on through all channels. From the second output 25 of the device of the last channel through the element OR 4 - to the second input 22 of the device of the first channel, resumed polling. When a high potential appears at the channel request input 17 under the action of a polling pulse, the trigger 5 is set to one and the polling pulse does not pass through the AND 9 element, a high potential appears at the output 19 of the channel trunk pickup confirmation, after which the subscriber whose channel is selected provides information to information inputs 20, co0

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accompanied by sync series. This information passes sequentially through all the channels, and none of the channels under the action of the information signal can be chosen, because the information signal is not passed through the AND 10 element by inverting the sync signal from the output of the NOT 13. Access to the first (kl) -e inputs 21 of the device ., the second, third inputs 22 and 23 of the device of the selected channel, the information enters the (k + l) -e information outputs 19 of the selected channel (the information does not pass through the low potential at the first output of the trigger 5). After the (k + l) -x information outputs 20 of the channel that captured the trunk is the last information word, the subscriber of this channel removes the request signal, the low potential at the output 18 of the highway capture confirmation is low. channel, the one-shot 15 last generates a pulse, which as a polling signal passes through the element OR 16 to the second output 25 of the device of the channel that has completed the exchange, resumed the polling of the channels.

Claims (1)

Invention Formula A multichannel device prioritizing, containing an element NOT, a single vibrator, an element OR, and K (where K is the number of subscribers) channels, each of which contains a trigger, a one-shot, the first and second elements NOT, from the first to the fourth elements AND, the first element OR , the first and second delay elements, the logical bus of the device being connected to the input of the element NOT, the output of which is connected to the input of a single-vibrator, the output of which is connected to the first input of the SHS element whose output is connected to the input of the first delay element of the first channel, each channel, the input request for capturing the device's trunk is connected to the information input of the trigger and to the input of the first element NOT, the output of which is connected to the installation input of the On trigger, the direct output of which is connected to the output of the confirmation of the channel's trunk capture and the input of the first one-oscillator connected to the first input of the first elec OR, the inverse output of the trigger is connected to the first input of the first element AND, the output of which is connected to the second input of the first OR element, characterized in that, in order to reduce the equipment volume, each channel contains from the third to (K + 1) -th delay elements and from the fifth to (k + 2) -u elements I (where k is the width of the word transmitted through the line), with the inverse output of the trigger of each channel connected to the first inputs from the second to (k +) elements And, the outputs from the first by (k + l) -u delay elements are connected respectively with the second inputs from the first to (k + l) -ft of the And elements, the output of the second element is NOT connected to the first input of the (k + 2) -ro element And, the output of which is connected to the trigger trigger, the n-th (. K) bit of information the input of the t-th (t 1, L-1) channel is connected to the output of the (n + + 1) -th element of the t-th channel and to the input of the (n + 1) -th delay element and the n-th bit of the information output (in + l) -ro channel, the first bit of the information input of the m-th channel is connected to the output of the first element of the OR-th channel and to the input of the first the delay element, the second input () -ro of the And element and the first bit of the information output of the (in + l) -ro channel, the input signal of the tracking signal of the transmission of the word of the th-th channel is connected to the output of the second element of the I-th channel and to the input of the second element NOT, by the input of the second delay element and the output of the signal of transmission (m + 1) -th channel, the n-th bit of the information input of the L-ro channel, is connected to the output of the (n + 1) -th element and the L-ro channel, with the input (n + 1) of the delay element and with the nth bit of the information output of the first channel, the first bit of the information input L-ro channel is connected to the output of the first element OR of the L-th channel and to the second input of the OR element, the output of which is connected to the second input (k + +2) of the AND element and the first discharge of the information output of the first channel, The word L-th channel is connected to the output of the second element AND the L-ro channel and to the input of the second element NOT, the input of the second delay element and the output of the signal of the transmission sign of the first channel.