SU1282123A1 - Multichannel priority device - Google Patents

Abstract

The invention relates to computing and can be used to create multi-channel data transmission and processing systems. The purpose of the invention is to reduce hardware costs. The device contains a delay element 12, and in each channel there is a request trigger 2, a request confirmation trigger 3, two elements AND 4, 5 and an element OR NOT 6. In the device, when there is no request at the output of element 4, a permission confirmation signal is generated. In the case of a request, the signal from the output of the element And 5 enters the input of the trigger 3, translates it into O. At the same time, the formation of the permission confirmation signal at the output of the element 4 is blocked. 1 Il.

Description

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The invention relates to computing and can be used to create multi-channel data transmission and processing systems.

The purpose of the invention is to reduce hardware costs.

The drawing shows a functional diagram of a multichannel priority device.

The multichannel priority device contains N channels 1, - 1, request trigger 2, request confirmation trigger 3, I4 and 5 elements, OR-NOT 6 element, setup inputs 7 and 8, output 9, - 9 of each device channel, resolution input 10, interrogation inputs 11, - 1C and delay element 12.

The multichannel priority device operates as follows.

The device is reset to the initial state by applying pulse signals to inputs 7 and 8, which establish the request triggers 2 and 3, respectively, and confirming the request to state 1. There is no enable signal in the initial state, i.e. At the entrance 10, the resolution is the potential of O.

The request signal, which arrives at input 11 when there is no permission signal at input 10, passes through the W-ST-6 element and arrives at the synchronization input of the D flip-flop 2 of the request and translates it into the O state.

When a permission signal arrives at input 10 as a logical 1, the request signal passes through the element

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After time tj, the transients in the circuit element OR-NOT 6 - request trigger 2, and the signal from the output of request trigger 2 arrive at the first inputs of trigger 3 of the request confirmation and AND 4 element. In this case, if no request is received, the potential from the output of the trigger 2 requests l if the request is accepted

After j 031, the resolution signal from the output of delay element 12 arrives at the third input of element 4. If at this time the trigger 2 of the request is in state 1 (i.e. there is no request), then a signal is generated at the output of element 4;

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day of resolution in the form of a logical one. If the trigger 2 of the request is in the state O (i.e., when the request is accepted), then with the arrival of the delayed resolution signal in the form 1 to the second input of the element And 5 and if there is a single potential for confirmation The first input at its output is a single signal that arrives at the synchronization input of trigger 3 for request confirmation, translates it to state O, and at its output 9 a signal appears in the form of logical O. The zero potential from the output of trigger 2 is sent to the first input element and I4, blocks the formation of a signal to confirm the output resolution

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Triggers 2 and 3 of the request, respectively, and the confirmation of the request to the initial state are set by signals from the device that received the request confirmation signal.

Claims (1)

Invention Formula A multi-channel priority device containing in each channel, a request trigger, request confirmation trigger, AND and OR NOT elements, the request trigger trigger input being the first device setup input, the request trigger output being connected to the request acknowledgment trigger information input and the first input of the first element And, the setup input of the request confirmation trigger is the second setup input of each device channel, the output of the request confirmation trigger is the output of each channel device, the second input of the first element AND is the enable input of each channel of the device, the first and second inputs of the OR-NOT element are respectively the request input and the enable input of each channel of the device, the output of the OR-NOT element is connected to the clock input of the request trigger, o In order to reduce hardware costs, a second AND element is introduced into each channel, and the device contains a delay element, the input of which is connected to the device enable input 3 1282123 and the output is to the first input of the second and first channel, the output of the first element to the third input of the first element of the Ita AND i-ro channel (i-1,2 ,,. п, where n is each channel, the output of the second ele-number of requests) is connected to the second ment And connected to the clock input input of the second and fourth input request confirmation trigger, input 5 of the first AND (i + -1) -ro channel elements, confirmation of device permission connected to the second input of the second input with the permission input by the device with the fourth input of the first element Willow.