CS271684B1 - Connection for sequentiall circuit's initial state adjustment - Google Patents

Abstract

The solution concerns the connection, which serves to the set-up of the initial state of the sequential circuit by the setting signal. Its simple concept accomplishes the saving of one or two outlets, and brings the possibility of the repeated set-up of the condition on easing the condition of the feed voltage. The existing memory and control units can be used in the connection. Its basis concerns the fact that it contains a group of the address outputs of the sequential circuit, which are connected to the group of the address outputs of the storage element. The group of the data outputs is connected to the group of the data input of the control unit and at the same time forms the group of data outputs of the connection. The setting output of the control unit is connected to the setting input of the sequential circuit.<IMAGE>

Description

(57) The solution relates to a wiring which is used to set the initial state of a sequential circuit by adjusting signals _o In its simple implementation, it saves one to two terminals, ¹ possibility of re-setting the state when the supply voltage is calmed. Existing memories and controllers can be used in the connection. It is based on the fact that it comprises a group of address outputs of a sequential circuit ¹ which are connected to a group of address inputs of a memory member. Its data output group is connected to the data input group of the control unit and simultaneously forms the data output group connected. The setting output of the control unit is connected to the setting input of the sequential circuit.

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The invention relates to a circuit for adjusting the initial state of a sequential circuit by adjusting signals.

In order to miniaturize and reduce the cost of integrated circuits, it is necessary to make 8 as few outlets as possible. To this end, it delivers more signals to each terminal which distinguishes themselves within the integrated circuit by coding amplitude selection, width selection, time selection etc. In order to set the initial state of the integrated circuit, a separate terminal is usually provided, to which the control signals are supplied from the control unit, or another terminal to which the signals are also supplied, also from the control unit, to change this state. This means je- _Ί day or two extra pins, one of which terminals i.e. terminal for setting the initial condition, has only a single application. If only this terminal is available, it is not possible to repeat the setting when the supply voltage is calm.

These drawbacks are eliminated by the wiring for adjusting the initial state of the sequential circuit with address outputs connected to the memory member by setting signals according to the invention, which is based on the group of sequential circuit address outputs being connected to the address input group of the memory member. The control output of the control unit is connected to the setting input of the sequential circuit. The data output group of the memory member is connected to the data input group via the transformer / wherein the control output group of the controller is connected to the input group of the transformer member.

The advantage of this circuit for setting the initial state of the sequential circuit is its simplicity, saving of one or two outlets / possibility of repeated setting of the state in the calm state of the supply voltage, while already existing memories and control units can be used in the circuit.

An example of a circuit according to the invention is shown in the drawing, in which Fig. 1 shows a block diagram of the circuit, Fig. 2 shows a block diagram of the alternative circuit.

Group address outputs 012 sequencer ^ 1 - Fig. 1 - is connected to the group address inputs 21 of the memory Cisne 2, the group of data output 021 is connected to a plurality of data inputs 31 of the control unit 2 ⁸ simultaneously forms a plurality of data outputs 022 wiring for connection to information processing equipment (not shown). The setting output 031 of the control unit 6 is connected to the setting input 11 of the sequential circuit

1.

In the circuit according to FIG * 2 / otherwise identical with the circuit according to FIG · 1 * between the storage member 2 and the control unit £ inserted transforming member 4, ^one such that the group of data outputs 021 of memory member 2 is connected to ekupinu data inputs 41 of the transforming member 4 Whose data output group 041 is connected to the data input group 31 of the control unit Д and the control output group 032 of the control unit 8 is connected to the input group 42 of the transformer member 4;

In both cases, the control unit and the memory member 2 are used, which are already contained in information processing devices (not shown).

In one cell of the memory member 2, it pre-writes the status information assigned to the initial state of the sequential circuit 1 and differs from the information written in the other cells of the memory member 2. This additional information is normally used to operate the information processing apparatus. When the supply voltage is switched on, the sequential circuit 10 will be in some random state. If this random state corresponds to the desired initial state of the sequential circuit .1, no setup process will be in progress. If the random state is other than the desired initial state, then the memory member 2 reads, the read data is fed to the data input group 31 of the control unit 6, and the control signals 3 are simultaneously sent from the control unit 3 to the adjusting input 11 of the sequential circuit. Once the control unit 3 detects the reading of the status information, it stops transmitting the setting signals.

Thus, the sequential circuit 1 is set to the desired initial state. Since in the control unit 3 it is coded, how many states the sequential circuit 1 can have and in which order, the desired initial state of the sequential circuit 1 can be set by sending further adjustment signals. whose number is determined by the number of states by which the requested state is distant from the current state ·

If there is no free cell for the status information in the memory member 2, a unique combination of information of several consecutive cells is created, different from combinations of the same number of consecutive remaining cells. To detect this combination serving as status information, the transformer 4 - Fig. 2 is used, whose signals after evaluation of this combination are fed from its group of outputs 041 to the group of data inputs 31 of the control unit 31. Otherwise the operation of this circuit is the same as Fig. 1.

The invention can be used in contactless keypad systems equipped with custom integrated circuits.

Claims (2)

1. Circuit arrangement for setting the initial state of the sequential circuit, "whose address outputs are connected к memory member 'adjustment signals, characterized in ^t that the group address output (012) of sequential circuit (1) is connected to the group address inputs (21) of the memory a member (2) whose group of data outputs (021) is connected to a group of data inputs (31) of the control unit (3) and simultaneously forms a group of data outputs (022) of the wiring, the setting output (031) of the control unit (3) setting input (11) of sequential circuit (1) · 2 «circuit arrangement according to claim 1» ^wherein: the plurality of data outputs (021) of said memory element (2) is connected to a plurality of data inputs (31) through transformative element (4), wherein the group of control outputs (032) of the controller (3 ) is connected to the input group (42) of the transformer member (4) ·