JPH05207532A - Line setting control circuit - Google Patents

Abstract

PURPOSE:To prevent the mis-designation of line setting or to correct early discovery by devising the control circuit such that the designated content of line setting is confirmed. CONSTITUTION:A setting data signal generated by a control circuit 5 is set to one of registers 3, 4 selected by register selection signals 102, 103. After the edition, the setting data signal stored in the registers 3, 4 is selected by a selection circuit 2 and inputted to the line setting section 1, in which line connection is designated. When the register 3 is selected by the register selection signal 102 in the control circuit 5, the selection signal 101 selects the register 4 normally. Furthermore, the control circuit 5 reads the setting data signal stored in the registers 3, 4 at any time to confirm the setting content.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line setting control circuit, and more particularly to a line setting control circuit used in a communication device or the like.

[0002]

2. Description of the Related Art Conventionally, this kind of line setting control circuit is shown in FIG.
The configuration is shown in. FIG. 2 is a block diagram showing the configuration of a conventional example. A line setting unit 21 for connecting a plurality of input signals and a plurality of output signals with a setting data signal from a register 22, a control unit 24 for generating and outputting a setting data signal, and setting data from the control circuit 24. It is composed of an editing register 23 for holding a signal.

The setting data signal generated by the control circuit 24 is temporarily held in the register 23, edited by the control of the control circuit 24, and finally read and confirmed, and then the data shift signal from the control circuit 24. It is moved to the register 22 by 201. The line setting of the line setting unit 21 is performed by the setting data signal for the operation of the register 22, and the setting data signal is the data shift signal 20.
By 1, the set contents are updated to the set data signal of the register 23 one after another.

[0004]

As described above, in the conventional example, since the data of the register for editing is shifted to the register for operation control, the status of the register for operation control, I do not know the status of the line connection that is currently set.For this reason, even if a line setting different from that recognized by the control unit is set due to a transfer error at the time of data shift or a failure in the register for operation control, There is a problem that it cannot be detected.

[0005]

A line setting control circuit according to the present invention comprises a line setting section for connecting a plurality of input signals and a plurality of output signals by setting data signals, and two line setting units each having different contents. A selection circuit that inputs a setting data signal, selects one of them according to a selection signal, and outputs the selected setting signal to the line setting unit; two registers that temporarily hold the two setting signals and output them to the selecting circuit; A control circuit for generating and alternately selecting and inputting one of the two registers and outputting the selection signal.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of this embodiment. The setting data signal generated by the control circuit 5 is input to one of the registers 3 and 4 selected by the register selection signals 102 and 103. Register 3,
One of the setting data signals held in 4 is selected by the selection circuit 2 and input to the line setting unit 1 to specify the line connection.

The control circuit 5 is, for example, a register selection signal 1
The register 3 is selected by 02, the generated setting data signal is input, and when this is being edited, the selection signal 101
Normally selects the register 4 and outputs the line data signal held in the register 4 to the line setting unit 1 for operation. Then, when the setting data signal of the register 3 is selected next for operation, a new setting data signal is input to the selector 4. Further, the control circuit 5 can read each setting data signal held in the registers 3 and 4 as needed to confirm the setting contents.

[0008]

As described above, according to the present invention, since the setting data contents of the line setting can be read out and confirmed at any time, the designation error of the line setting can be prevented or the designation error can be detected and corrected early. Out. Therefore, there is an effect of improving the reliability of the line setting.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1 line setting unit 2 selection circuit 3 and 4 register 5 control circuit

Claims (1)

[Claims] 1. A line setting section for connecting a plurality of input signals and a plurality of output signals by setting data signals, and two setting data signals having different contents respectively, and one of them is selected by a selecting signal. A selection circuit for outputting to the line setting unit, two registers for temporarily holding the two setting signals and outputting to the selection circuit, and a circuit for generating the setting data signal to select one of the two registers alternately. A line setting control circuit, comprising: a control circuit that inputs and outputs the selection signal.