SU1487040A1 - Multichannel priority unit - Google Patents

Description

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

The purpose of the invention is the expansion of the field of application of the device due to the possibility of redistributing the absolute priority of channels by the subscriber who has captured a common resource,

• The drawing shows the functional diagram of the device.

The device contains M channels 1, a trigger 2 before the first channel, a delay element 3, a one-shot 4, and a trigger 5 in each of the M channels 5, a delay element 6-8, an AND-OR element 9, a one-shot 10, a HE element 11 and 12,. And elements 13-, 15, generator 16 is set2

Mu resource. The purpose of the invention is to expand the field of application of the device due to the possibility of redistributing the absolute priority of channels by the subscriber who captures the common resource .: A multichannel priority device contains a trigger, a delay element, a one-shot and K channels (K number of subscribers), each of which contains a trigger, three delay elements, element 2И-OR, element IS-NOT, two comparison circuits, counter, shift register, two elements NOT, three elements AND, one-shot, two elements OR; and a generator of a predetermined sequence of pulses. 1 il.

pulse sequence, inputs 17 of the number of subscribers and 18 numbers of the subscriber of the channel of the device, register 19, counter 20, comparison circuits 21 and 22, I-NE element 23, OR elements 24 and 25, channel request input 26, first information input 27, output 28 confirmation of the channel request, inputs 29 polling and 30 mode, the second information · - ?. The mation input 31, the outputs 32 polling and 33 modes, the information output 34 of the device channel.

The device 'works as follows.

In the initial state, all device triggers are in "O", the contents of the counters 20 and the device channel 19 registers are zero, the input 26 of the channel request and the information input 27 is low potential. When turning on the device generator before per511., 1487040 A1

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vym channel containing trigger 2, delay element 3, one-shot 4, produces a polling pulse that passes through all the channels of the device sequentially, interrogating them, and from the output 32 of the device of the last channel returns to the generator’s input, which regenerates the polling pulse and etc. In the absence of a request signal in the channel, a polling pulse passes through the channel along the circuit: delay element 6, AND-OR element 9, one-shot 10; When a request signal appears in the device, a high potential at the channel request input 26 on the leading edge of the polling pulse input 29. device, the trigger 5 is set to "1", and the low potential appearing on the inverse output of the trigger 5, does not pass through the AND-OR 9 element delayed by the response time of the trigger 5, the polling pulse from the output of the delay element 6; at the output of the element is NOT 11 with a low potential. The interrogation of channels is terminated, a high potential appears at exit 28, confirming the request for a channel, the subscriber seizes the highways. This subscriber during his exchange vvdaet the information input 27 information about which channel is necessary to make the gap line absolute priority, which coc ¹ Toit of pulse trigger generator in each channel 16; after this impulse, order- is transmitted. The number of the subscriber, in which it is necessary to make a line of absolute priority. The generator 16 generates in each channel a series of pulses, the number of which is equal to R ⁷ / ^ Ιο ^ Μ. The pulses from the output of the generator 16 control the operation of the register 19: give a signal to the input of entering information from the information input of the third register 19, shift the contents of the register 19 by one digit in the direction of the higher bits. The impulse to start the generator 16 on the register 19 is not accepted, the serial number of the subscriber is entered there, who should break the line of absolute priority in his channel. When this is taken on register 19, a high potential appears and the output of the comparison circuit 21, since the input 17 has a width of C 1o £ _a P

each channel is wired with a value equal to the sum of the pulses counted by the counter 20. The input of each channel 18 gives the value of the sequence number of this channel, and when it coincides with the channel sequence number received on register 19, a high potential appears at the output of circuit 22 comparing this channel , low potential - at the output of the element IS-NOT 23, at the output of the element And 14 of this channel, in this channel the line of absolute priority is broken, therefore, the subscriber of this channel, placing a request, can interrupt the exchange of the subscriber of any other channel as well as breaking the absolute priority of the line via the AND gate 14 of its channel, the subscriber through an OR gate 24, vschavaya high potential through the elements is not 12 of each channel can interrupt the exchange of any channel. A high potential, however, through the element AND 14 of the channel, which has broken the line of absolute priority, is not passed, and a high potential is maintained at the output of the element NOT 12 of this channel. ' Thus, the subscriber who captured the trunk, specifying the number of the subscriber whose channel breaks the line of absolute priority, distributes the absolute priority of the channels, i.e. determines · subscribers who can interrupt its exchange, So, if a channel with a sequence number P and a channel number breaking the line of absolute priority are chosen, T, where T <P, then subscribers having serial numbers with T can interrupt the exchange of the P-th subscriber by P - 1. If T> P, then subscribers who have serial numbers from 1 to P - 1 and from T to M can interrupt the P-th subscriber. If P = T, then the exchange of the subscriber who seized the highway cannot interrupt none of the subscribers. When removing the request, if the exchange was not interrupted, a low potential appears at the output of the element AND 13 of the channel whose subscriber finished the exchange, high at the output of the element NOT 11, at the output of the element AND-OR 9, the positive differential of which launches the one-shot 10, sets the trigger 5 to zero, a low potential appears at the output 28 of the channel request acknowledgment. The polling pulse from the output of the one-shot 10 channel of this channel resets the contents of counter 20 and register 19

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and passes to the input 29 of the device of the next channel, to the input 30 of the device which receives a low potential from the output of the delay element 8, which delays the low potential appearing at the output of the element OR 24 ja circuit response time: element

6 delays, element AND-OR 9, one-shot 10, i.e. in all channels, before the channel interrupted the exchange, the channel subscribers will be polled first, then the contents of counter 20, register 19, channel will be reset, since the high potential at the output of the NOT item 12 channel will appear after it is polled, i.e. in this case, the subscriber who breaks the line of absolute priority will have the highest priority. When the polling signal passes through all channels, the contents of counter 20 and register 19 of all channels will be reset, i.e. The delay element 8 is necessary for the device to operate in the priority mode, since the first after the subscriber exchange of the selected channel ends, if the exchange was not interrupted, the channel that broke the line of absolute priority will be polled. In addition, if the B exchange to the subscriber is interrupted by the B to K subscriber, a low potential appears at the input of the first element of channel 13, the trigger 5 of this channel is set to "0", the polling pulse generated by the one-channel 10 of this channel, passing successively through the channels clears the contents of counter 20 ,. register 19 channels, which break the absolute priority line after passing a polling pulse. Therefore, delay element 8 also serves to B - K in some channel (the absolute priority of which is lower than that of B - K) ra The break of the absolute priority line did not occur before the polling pulse passes through the channel, ie, that this channel could not be selected, that is, so that a channel that has an absolute priority not lower than that of the B – K channel could be selected. If a B - K channel is selected that interrupts the B channel exchange, the contents of counter 20 and the 19 channel register (B – K + 1) - (B – 1) will not be reset by the polling pulse, it is reset by the pulse starting generator 16 from input 31 and 34 channel output, as the output of the circuit

21 comparisons of these channels in this case are high potential. The subscriber who transferred the trunk re-redistributes the absolute priority of the channels as described above.

Claims (1)

Claim A multichannel priority device containing a trigger, a delay element, a one-shot and K channels (K is the number of device subscribers), each of which contains the first delay element, the trigger, the first element NOT, the one-shot, element 2I-OR, and the polling output K-th the device channel is connected to the trigger sync input, the information input and the installation input in “O” of which are connected respectively to the bus of the logical unit of the device and the output of the delay element, the inverse output of the trigger is connected to the input of the delay element and one-vibration input Ator, the output of which is connected to the polling input of the first channel, the polling output of the M th channel (M = 1, K-1) of the device channel is connected to the polling input of the (M + 1) th device channel, and in each channel the polling input of each channel of the device connected to the trigger trigger input and the input of the first delay element, the output of which is connected to the first input of the 2I-OR element, the output of which is connected to the installation input in the “O” trigger and the one-shot input, the output of which is connected to the device polling output, the direct output of the trigger is connected with confirmation device channel request and with the second input of element 2И-OR, the third and fourth inputs of which are connected to the output of the first element NOT and with the inverse trigger output, characterized in that, in order to expand the scope due to the possibility of redistributing the absolute priority of the channels by the subscriber who captured a common resource, each channel additionally contains from the first to the third elements AND, the second element NOT, the first and second elements OR, the second and third delay elements, the pulse generator, the first and second comparison circuits, re ISTR shear, counter, AND-NO element whose output is connected to a first input 7 1487040 eight The first element AND, the output of which is connected to the first input of the first element OR and the input of the second element NOT, the output of which is connected to the first input of the second element AND, the second input of which is connected to the input of the device channel request, the output of the second element AND connected to the information input of the trigger, the input of the first element and NOT with the second input of the first OR element, the output of which is connected to the input of the second delay element, the output of which is connected to the output of the channel mode of the device, the same input of which is connected to the second input m of the first element And, the third input of which is connected to the first inputs of the third element AND and the NAND element and to the Equal output of the first comparison circuit, the first and second inputs of which are connected respectively to the input of the device channel subscribers number and the output of the counter, whose input connected to the output of the pulse generator, to the input of the third delay element and to the input of the record of the shift register, whose shift control input is connected to the output of the third delay element, the output of the one-vibrator is connected to the first input of the second OR element, the output of which is connected to the second input of the third ίο element I, the output of which is connected to the inputs of the installation in the "O" counter and shift register, the output of which is connected to the first input of the second comparison circuit, the second input and output "Equal" which are connected respectively to the input of the subscriber number of the channel device and with the second input element AND-NOT, the information inputs of the channel of the device are combined and connected to the second input of the second element OR, to the start input of the pulse generator and to the information input of the shift register of all channels WA, the output mode of the device M channel is connected to the mode input. (M + 1) -th device channel, the output of the K-th channel mode of the device is connected to the mode input of the first channel of the device. 1487040