SU1704113A1 - Method of digital circuit control - Google Patents

Abstract

The invention relates to an instrumentation technique and can be used for the automated monitoring and diagnostics of digital circuits. The aim of the invention is to simplify the process of controlling combinational digital circuits, which is achieved by creating temporary artificial circuits. A device for controlling digital circuits contains a pulse counter 1, a pulse generator 2, a register 3, a controlled digital circuit 4, a pulse counter 5, a control unit 6, a switch 7. The switch contains current-limiting connectors that create artificial connections to form a circuit series-connected elements of the digital circuit 4. 1 Il.

Description

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The invention of the CTG for measuring and control equipment and can be used for automated control and diagnosis of digital circuits.

The purpose of the invention is to simplify the process of controlling combinational digital circuits by creating temporary artificial circuits.

The drawing shows the structural scheme of the device for implementing the method

The device for controlling digital circuits contains a pulse counter 1, a pulse generator 2, a register 3, a controlled digital circuit 4, a pulse counter 5, a control unit 6, a switch 7.

The method of controlling digital circuits is implemented as follows.

Register 3 of the control block b records the code for issuing from the outputs of register 9 resolution levels to the inputs of temporarily connected elements of a series of circuit elements of the controlled circuit to ensure that the test sequence passes through an artificially connected circuit. The control block b through the switch 7 through the current-limiting elements-connectors of the switch 7 forms the corresponding artificial circuits. The control unit 6 writes into the pulse counter 1 a code of the number of pulses delivered to the monitored digital circuit 4. A command from the control unit 6 starts the generator of 2 pulses and a burst of pulses, the number of which in the packet is equal to the code recorded in the counter 1. an artificial circuit of series-connected elements of the digital circuit 4. of pulses passes the following way: from the generator 2 output, pulses arrive at the input of the first artificial element

the serial circuit of the elements of the monitored digital circuit 4. Since the output signals of register 3 allow the passage of a burst of pulses throughout the temporarily formed artificial circuit, the output of this serial circuit with the help of counter 5 records the number of pulses transmitted from input to output. The control block b according to the control signal compares the counter code 5 with the counter code 1. In order to prevent electrical damage to the outputs of the monitored digital circuit 4, the switch 7 contains current-limiting connectors, through which artificial connections are created to form a circuit from all series-connected digital circuit elements 4.

Claims (1)

Claims The method of controlling digital circuits, which consists in supplying test inputs to a controlled circuit, record the output responses, compare them with the reference values, judging by the comparison results about the health of circuit elements, characterized in that. In order to simplify the process of controlling combinational digital circuits by creating temporary artificial circuits using current-limiting connectors, they form temporal serial connections of all elements of the controlled circuit, to the inputs of elements not participating in the formation of trace elements of all the elements of the controlled circuit, according to the functional purpose of the elements, input signals to ensure the passage of the test effect on the resulting sequential circuits, and frmiru.tg in dnye exposure test in the form of bursts.