JPH0575850U - Time chart paper making device - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a time chart paper making apparatus for making a time chart making paper used in designing an electronic circuit of an LSI or the like in an optimum form for the electronic circuit. [Structure] An input / output signal of an electronic circuit for which a time chart is to be generated and its timing information are given to a microcomputer via an input circuit, and a timing information analysis means, a plot size determination means, a plot coordinate calculation means, and a plotter format creation means are used. After processing, pass the data to the plotter and output the time chart creation paper.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a time chart paper making apparatus for making a time chart making paper used in designing an electronic circuit such as an LSI in a format suitable for each circuit.

[0002]

[Prior Art]

 FIG. 4 is a diagram showing a conventional time chart form shown in, for example, the '90 Mitsubishi semiconductor gate array edition. In the figure, reference numeral 15 is a signal name description section for creating a time chart, and 16, 17, and 19 are descriptions, respectively. The timing definition classification code corresponding to the signal of the section 15, the input / output identification code, and the terminal name are shown, and 18 is the area for describing the time chart. Reference numeral 14 is a signal change point instruction line drawn in advance in the time chart description area.

Next, the operation will be described. As for the time chart paper, the time chart was entered on a standard sheet as shown in Fig. 4. First, enter all signal names for which a time chart should be written in the signal name description section 16, and enter the timing definition classification code, input / output identification code, and terminal name in areas 16, 17, and 19, respectively. Next, a time chart is created using the vertical lines indicating the logical values of "H" and "L" in the time chart description area 18.

[0004]

[Problems to be solved by the device]

 Since the conventional time chart entry form uses the above standard sheets, it may not be possible to describe it without using multiple sheets when the number of signals is large. Since the timing of change is the same, it is troublesome to count the position of each change in signal. In addition, it is often desirable to display hexadecimal data as data for bus signals and the like, rather than describing each waveform data one by one, but such a description cannot be performed.

The present invention has been made to solve the above-mentioned problems, and the time chart paper size can be selected according to the number of signals, and the waveform description and the data description can be selected. The purpose is to obtain a time chart paper creation device that creates time chart paper corresponding to each circuit by marking the change points only at the time corresponding to the signal change timing of each signal.

[0006]

[Means for Solving the Problems]

 A time chart paper creating apparatus according to the present invention receives timing information data of signals, calculates timing information analysis means, determines a plot size according to the number of signals, and calculates coordinates of each signal and signal change points. The time chart sheet is output to the plotter through the means and the plotter format conversion means.

[0007]

[Action]

 In the time chart paper creating apparatus according to the present invention, the output time chart paper is customized in a short time by the timing information analysis means, the plot paper size determination means, and the plot coordinate calculation means to the optimum time chart for each circuit characteristic. Therefore, it is possible to reduce the occurrence of mistakes in the time chart creation and to shorten the creation time.

[0008]

【Example】

 Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is an input circuit, 2 is a timing definition analysis means for analyzing the timing definition of the data given from the input circuit 1, and 3 is the number of signals, which is the final plotting paper according to the number of data. Plot paper size determining means for determining size, 4 is plot coordinate calculating means for calculating coordinates such as signal position and data change point position, 5 is plotter format generating means for taking I / F to the plotter, 6 Is a plotter that outputs time chart creation paper.

FIG. 2 is a circuit diagram showing the electrical connection of the first embodiment shown in FIG. In the figure, 12 is a micro computer, which has an input circuit 1, an output circuit 11, a CPU 9, and a memory 10. Reference numeral 7 is an external storage device, 8 is a keyboard, 6 is a plotter, and 13 is a display monitor.

Next, the operation will be described with reference to FIGS. An input / output signal of an electronic circuit for which a time chart is to be generated and data relating to the timing information are given to the microcomputer 12 from the external storage device 7 or the keyboard 8. The given data is processed by the CPU 9 via the input circuit 1. After the time chart paper data is processed into the plotter format, it is output to the plotter 6 via the output circuit 11 and plotted as the time chart paper. At the same time, plot data information is output to the external storage device 7 or the display monitor 13 as data. Means processed by the CPU 9 will be described below.

The timing information analysis means 2 determines the name of a signal to be created as a time chart, the input / output identification information, the definition of the time to be changed in one cycle, and whether to display the signal in waveform or data. It is first performed to perform an analysis of the data given for. If there is an error in the input data at this stage, an error message is displayed on the display monitor 13 and all processing is interrupted.

The plot paper size determining means 3 does not change the designation of the paper size when the paper size is designated. If the paper size is not specified, when creating a normal time chart according to the total number of signals given to the input circuit 1, the paper size should be set so as to secure the vertical width of the signal to secure the minimum space. Automatically set.

The plot coordinate calculation means 4 determines the vertical and horizontal coordinates of the signal so that all the data fits within the paper size determined by the plot paper size determination means 3 in the previous stage, and the time at which each signal should change. The coordinates of the signal change point instruction line 14 and the data description area 20 corresponding to are calculated.

The plotter format generation means performs conversion to a format of the plotter that outputs the finally obtained time chart creation sheet.

[0015]

[Effect of the device]

 As described above, according to the present invention, the time chart paper most suitable for the characteristics of the signal for which the time chart is to be created can be easily obtained, so that mistakes at the time of time chart creation can be reduced and the creation time can be shortened. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a time chart paper making apparatus according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing the electrical connection of the time chart paper making apparatus according to the present invention.

FIG. 3 is a diagram showing a time chart sheet output according to the embodiment of the present invention.

FIG. 4 is a view showing a conventional time chart paper.

[Explanation of symbols]

 1 input circuit 2 timing information analysis means 3 plot paper size determination means 4 plot coordinate calculation means 5 plotter format generation means 6 plotter 7 external storage device 8 keyboard 9 CPU 10 memory 11 output circuit 12 microcomputer 13 display monitor 14 signal change point instruction Line 20 Data description area

Claims (1)

[Scope of utility model registration request] 1. An input circuit for inputting time chart data, timing information analysis means for analyzing the relationship between each signal of the data input to the input circuit and timing information, based on the number of signals or designated paper size data. A plot paper size determining means for determining the size of the time chart paper output to the plotter, a plot coordinate calculating means for calculating the coordinates of the signal position / signal change point at the time of plotting, and a plotter for outputting the time chart paper are provided. Time chart paper making device.