SU1622935A1 - Asynchronous distributor - Google Patents

Abstract

The invention relates to automation and computing and can be used in asynchronous control devices. The distributor contains cells 1, each of which consists of AND-NOT elements 2-4. The outputs of elements 2-4 are connected respectively to the output tires 5-7 cells, and the inputs in all cells, except the first and last, - with the corresponding input tires 8-14. Inputs 15 and 1b are, respectively, the installation input and the control input of the distributor, the outputs 17, 18 are the control outputs of the distribution valve, and input 19 are the input of the initial installation. As a result of the introduction of new connections between cells, the speed of the asynchronous distributor is improved. 3 il.

Description

Phie.1

The invention relates to automation and computing and can be used in asynchronous control devices.

The purpose of the invention is to increase the speed of the asynchronous distributor.

FIG. 1 shows the distribution diagram of the distributor, as well as the scheme of its first and last cells; in fig. 2 is a diagram of the k-th cell of the distributor (K k p, where n is the number of cells of the distributor); in fig. 3 is a timing diagram of its operation.

The distributor contains cells 1, each of which consists of AND-NOT elements 2-4. The outputs of the elements AND-NOT 2 - 4 are connected respectively with the output tires 5-7 cells, and the inputs in all cells, except for the first. and last, with the corresponding input tires 8-14. Inputs 15 and 16 are respectively the input of the installation and the control input of the distributor, the outputs 17, 18 are the control outputs of the distributor, and the input 19 is the input of the initial installation.

Asynchronous valve works as follows.

The state of cell 1 - the value at the information output (bus 6) corresponds to: 1 - a unit is written in the cell, O is a zero in the cell. The sets of values at the input 15 of the installation and the control loop 18 correspond to: 11 (00) - confirmation of the recording of the first cell of the unit (zero) value, 10 (01) —the value of the unit (zero) installed on the distributor installation bus, not yet recorded in the first cell.

The sets of values at control input 16 and control output 17 correspond to: 11 (GO) - confirmation of the entry in the last cell of the unit (zero) value received. 10 (01) - no confirmation of the entry of the value of a unit (zero) in the last cell.

Suppose that in the initial state at the input 15 of the installation and the control input 16, a set 01 is set, and on the output buses 5–7, the total number of distributor cells is 101. (To bring the distributor to the specified initial state, it is necessary to apply a zero logic level to the input 19 output and installation, resulting in the outputs of the elements AND-NOT 2 each cell in cc value of the logical unit, which will lead to the appearance of zero on the outputs of the elements AND-NOT 3 and the unit at the outputs of the elements AND-NOT 4 each cell After the initial mouth novki in the process of functioning of the distribution.

the bodies at the input 19 of the initial installation are fixed at a single logic level).

In an asynchronous distributor, the installation of the k-th cell is performed by feeding a single logic level to its bus 8 of the installation. At the same time, on the output of the NAND 2 element, the value of the Wits is zero only if the output bus has 7 cells 1.k + 1 and the information output bus 6 cells of the l.k-1 is a single logic level. The appearance of a zero at the output of the element AND-HE 2 leads to the appearance of a unit at the output of the element AND-NOT 3 (information bus 6, cell 1, k and bus 8, installation of cell 1 k-t-1). In the case, as soon as a unit value is written to the 1.kH cell (on the output bus 5 is a single logic level) and a unit value is set to the output spike 5, cell 1.k-1, the output of the AND-HE element 4 changes from 1 to O , which indicates the beginning of the reset phase of the 1.k cell. The zero value at the output of the element AND- NOT 4 is the reason for switching the output of the element AND-NOT 2 to one and in the event that on the output bus 7 cells 1, k-1 and the output bus 5 cells 1 k + 1 are the unit values indicating that a reset phase has passed in cell 1, k (its information bus 6 is set to O), and cell 1 to + 1 the recording phase is finished (its bus 7 is set to O), the output of the NAND 3 (information bus 6 cells lk) Wits zero value The latter leads to a change in the output of the element AND NOT 4 from O to 1, which indicates reset phase ends.

Until O (1) is written into cell 1, k, O (1) cannot be written into cell 1.k-1, since zero (one) value on bus 6, cell 1.k holds the output of the I- element NOT 4 cells 1.k-1 in the unit (zero) state, which prevents the appearance of a unit (zero) at the outputs of the element AND NOT 2 cells 1.k-1 and, in turn, does not allow to set the zero (unit) the value on the bus is 6 lk-1 cells. Consequently, when re-initiating the asynchronous distributor, before the previous cycle of its operation is completed, the subsequent wave of cell settings will not reach the previous one, since there will always be at least one cell of the initial state between them, which ensures proper function distributor in multiprogram mode

The interaction of the distributor with the input and output time by the ocymeci control devices is based on the query principle - OTEUJT.

To initiate the recording (reset) phase of the first distributor cell, the input control device sets at input 15 of the setting the value 1 (0). The signal of the end of recording phase (reset) in the first cell is the appearance of a single (zero) value at the control output 18. Similarly the occurrence of a zero (single) value at the output 17 of the distributor indicates that the write (reset) phase in the OGR has completed the last cell, whereby the output control device of the distributor sets the control input 16 to zero ( a single value for preparing the last cell of the new phase of operation.

1 As such, the input and output control devices of the distributor can be simulated by delay elements 20 and 21 (Fig. 4). The function of the four cell dispenser is illustrated with a timing diagram (Fig. 3) (when plotting the response of control devices, it is assumed to be zero) .

In the proposed asynchronous distributor, the passage time of one microprogram is 12t, where t is the delay of the NAND element, versus 14t in the prototype, i.e. 14% increase in speed.

Claims (1)

Invention Formula An asynchronous distributor containing cells, each of which consists of three AND-NOT elements, the outputs of the first and second AND-NOT elements being connected respectively to the first inputs of the second and third AND-NOT elements of the same cell, and the output of the third AND-NOT element in each cell, except the last one, is connected to the second input of the second element AND –NE of the subsequent cell, characterized in that, in order to increase speed, the outputs of the first AND-NOT elements in all the cells except the first and second are connected to the third input of the second element AND -NO previous cell and in all cells except the last, with the second input of the third of the AND-NOT element of the next cell, and in the second cell - with the second input of the second element AND -NE of the first cell, the output of the second element of the NAND in all cells except the first and second is connected to the third input the third element of the NAND of the previous cell and in all cells except the last one - with the second input of the first NAND element by the next cell, and in the second cell - with the second input of the third AND NAND element the first cell, the output of the third element AND- NOT in all cells, the first and last one, is connected to. the third input of the first NAND element and in all cells except the first, with the first input of the first element NAND of the previous cell, the fourth inputs of the first NAND elements in all cells except the first and last are connected to the initial installation bus, with which also connected to the third input of the first the element AND-NOT of the last cell, the second input of the first element AND-NOT of the first cell is connected to the input of the distributor installation, and the first input of the first element of the last cell is connected to the control input of the distributor, the outputs of the third AND-NOT element of the first and last cell of the distributor are respectively connected the first and second distributor control outputs.