JPS6322380B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a method for changing data stored in a memory circuit, and particularly to a method for changing data stored in a memory circuit in a short time without disconnecting the line. The present invention relates to a method for changing data in a memory circuit that allows for.

(b) Prior Art and Problems Hereinafter, a method for changing stored data in a conventional memory circuit will be explained using a time division switching switch as an example.

FIG. 1 is a block diagram of a conventional time division exchange switch, and FIG. 2 is a data frame configuration diagram.

In the figure, 1 and 2 are time slot exchange units (hereinafter referred to as TSI), 3 is a selector (hereinafter referred to as SEL), 4 and 6 are data memories, 5 and 7 are address control memories, 8 is a controller, and 9 is data. Area 10 indicates a free area.

TSI1 and TSI2 operate in a duplex configuration, and SEL
3, one of the output signals D and E of TSIs 1 and 2 is selected and output as signal F.

The address control memories 5 and 7 temporally control the address from which the data sent from the signal line A and stored in the data memories 4 and 6 are read, and the address from which this large amount of data is read is used as address control data. I remember. When it becomes necessary to update this address control data, a data update command and the address control data to be updated are sent from the signal line B to the controller 8.
The address control data stored in the address control memories 5 and 7 is updated under the control of the controller 8, but this is done in the empty area 10 of the data time slot shown in FIG. For this reason, there is a limit to the amount of changes that can be made in one empty area, and when a large number of address control data changes are made, several empty areas must be used, and a certain amount of time is required. It has the disadvantage of disconnecting the line.

(c) Object of the Invention In order to eliminate the above-mentioned drawbacks, the object of the present invention is to provide a method for changing data in a storage circuit that can change data in a storage circuit in a short time without disconnecting the line.

(d) Structure of the Invention In order to achieve the above object, the present invention provides first and second memories that are duplicated and each stores the same data, and selects and outputs read outputs of the first and second memories. and a control means that controls the first and second memories and the selection means and writes and changes data stored in the first and second memories. The control means includes the first
When receiving an instruction to change the data stored in the (or second) memory, the control means stops the operation of the first (or second) memory and causes the selection means to change the data stored in the second (or second) memory. By selectively outputting the output of the first memory, the data stored in the first (or second) memory can be written and changed while the data stored before the change can be read. The present invention provides a method for changing data stored in a storage circuit featuring characteristics.

(e) Embodiment of the Invention An embodiment of the present invention will be described in detail below with reference to the drawings. Here, too, the explanation will be given using a time division exchange switch as an example.

FIG. 3 is a block diagram of a time division exchange switch according to an embodiment of the present invention.

Components in the figure that have the same functions as those in FIG. 1 are designated by the same symbols, 3' is a selector, and 9 is a controller.

Normally, TSI1 and TSI2 operate in a duplex configuration, and in SEL3', the output signals D and E of TSI1 and TSI2 are
Either of these is output as signal F. When it becomes necessary to change the address control data, a data update command and the address control data to be updated are sent from the signal line B to the controller 9. Then, the controller 9 sends a signal via the signal line I to SEL3'
A signal is outputted to select signal D, and a signal is issued via signal line G to stop the normal operation of TSI 2 and write address control data. The time required for this write is fixed, so when the write is completed at the predetermined time, a signal is issued via signal lines G, H, and I, causing TSI2 to operate normally and SEL3' to select signal E. , the exchange service is performed using the changed address control data, the normal operation of TSI 1 is stopped, the address control data is written, and the changed address control of the address control memory 7 of TSI 2 is transferred via the signal line C. Write the data. Since the time required for writing is fixed, at the predetermined time when writing is completed, a signal is issued from the signal line H to cause the duplex configuration to operate.

By doing this, address control data can be changed without disconnecting the line.
It can be done instantly.

(f) Effects of the Invention As explained in detail above, according to the present invention, data in a memory circuit can be changed instantaneously without disconnecting the line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional time division exchange switch, FIG. 2 is a data frame configuration diagram, and FIG. 3 is a block diagram of a time division exchange switch according to an embodiment of the present invention. In the figure, 1 and 2 are time slot conversion units;
3, 3' are selectors, 4, 6 are data memories, 5,
7 is an address control memory, and 8 and 9 are controllers.

Claims (1)

[Scope of Claims] 1. First and second memories that are duplicated and store the same data, selection means that selects and outputs the read outputs of the first and second memories, and the first and second memories.
A memory circuit comprising a control means for controlling the memory and the selection means and changing the writing of data stored in the first and second memories, wherein the control means includes the first (or second) memory. When receiving an instruction to change the data stored in the memory, the control means stops the operation of the first (or second) memory, and causes the selection means to change the data stored in the second (or first) memory. By selectively outputting the output of the first
(or second) A method for changing stored data in a storage circuit, characterized in that writing and changing data stored in a memory is performed.