JPH0514956U - Logic analyzer - Google Patents

Abstract

(57) [Summary] [Purpose] To automatically output the contents of the trace memory of the logic analyzer to the printer without the user having to perform push button operations. [Structure] Trigger condition holding unit 5 that holds trigger conditions
And a trigger detection unit 6 that compares the trigger condition of the trigger condition holding unit 5 with each logic value signal from the signal input unit 2 and detects whether the trigger condition is satisfied, and a detection output of the trigger detection unit 6. And an external storage control unit 11 for outputting the contents of the trace memory 3 to an external printer. As a result, when the trigger condition is satisfied, the contents of the trace memory 3 can be automatically printed on the printer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a logic analyzer which receives a plurality of logical value signals as inputs, stores them in a memory for acquisition, displays the memory contents, and outputs the displayed contents to a printer.

[0002]

[Prior Art]

 Such logic analyzers are used for testing and adjusting various logic circuits, and are equipped with a large number of logic value signal input channels, and trigger conditions are set for specific channels among these input channels. When the signal of a specific channel is established, the input signals of all channels are stored in the trace memory and recorded, the contents are displayed by a cathode ray tube, etc., and the display contents are output to the printer by the push button operation. There is.

[0003]

[Problems to be solved by the device]

 However, in the past, in order to output the display contents to the printer, the user had to perform push button operation, etc., and even in the case of a low-frequency investigation test that occurs only once a day or night, it is always necessary. It had a drawback that it was inconvenient in operation because the user had to be nearby.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is configured by the following means. That is, in the above logic analyzer, a holding means for holding the trigger condition, a trace memory, a detecting means for comparing the trigger condition of the holding means with each logic value signal and detecting the establishment of the trigger condition, and the detecting means. Print control means for outputting the contents of the trace memory to an external printer according to the detection output of the means.

[0005]

[Action]

 Therefore, when the trigger condition is satisfied, the display content is output to the printer without the user performing a push button operation or the like.

[0006]

【Example】

Hereinafter, details of the present invention will be described with reference to block diagrams showing embodiments. In the figure, a plurality of probes 1 ₁ to 1 _n and a signal input section 2 composed of these and an input circuit corresponding to each of them are provided, and each output of the signal input section 2 is given to a trace memory 3. Each of the probes 1 ₁ to 1 _n is provided with a logical value signal to be detected.

In addition, a trigger condition setting unit 4 that sets a trigger condition corresponding to a desired one of the signals from the probes 1 ₁ to 1 _n , and a trigger condition holding unit 5 that holds the output thereof are provided. The trigger detection unit 6 compares the held output of this with the output of the signal input unit 2 to detect that the desired one of the signals from the probes 1 ₁ to 1 _n has satisfied the trigger condition. The detection output is given to the trace memory control unit 7 and the print control unit 11.

The trace memory control unit 7 stores the signals of the probes 1 ₁ to 1 _{n in} the trace memory 3 according to the detection output from the trigger detection unit 6 and controls the trace memory 3 to acquire each signal. The contents of the trace memory 3 are read out by controlling the trace memory control unit 7 by the display / display control unit 8 and displayed in the display / display control unit 8.

Further, the print control unit 11 controls the trace memory control unit 7 in response to the detection output from the trigger detection unit 6 to read each signal stored in the trace memory 3 and output it to an external printer. In the figure, 9 is a push button switch, and 10 is a print instruction input section, which corresponds to the conventional example.

As described above, according to the present embodiment, the trigger condition holding unit 5 that holds the trigger condition, the trigger condition of the trigger condition holding unit 5, and each logic value signal from the signal input unit 2 are compared, and By providing the trigger detection unit 6 that detects the establishment of the trigger condition and the external storage control unit 11 that outputs the contents of the trace memory 3 to an external printer according to the detection output of the trigger detection unit 6, When established, the contents of the trace memory 3 can be automatically printed on the printer without the user operating the push button switch or the like.

[0011]

[Effect of the device]

 As is clear from the above description, according to the present invention, when the trigger condition is satisfied, the display contents can be output to the printer without the user performing a push button operation, etc. Since it is not necessary to be present, it is convenient for operation, and a remarkable effect can be obtained in various logical circuit tests and adjustments, especially in a test test of a phenomenon that rarely occurs once a day or night.

[Brief description of drawings]

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

[Explanation of symbols]

1 ₁ to 1 _n probe 2 signal input unit 3 trace memory 4 trigger condition setting unit 5 trigger condition holding unit 6 trigger detection unit 7 trace memory control unit 8 display / display control unit 10 print instruction input unit 11 print control unit

Claims (1)

[Scope of utility model registration request] 1. When a plurality of logical value signals are input, and when any one of the logical value signals meets a specific trigger condition, each of the logical value signals is stored in a trace memory, and the contents of the trace memory are displayed. In a logic analyzer for outputting display contents to a printer, holding means for holding a trigger condition, detection means for comparing the trigger condition of the holding means with each of the logic value signals, and detecting the establishment of the trigger condition, and the detection means. And a print control means for outputting the contents of the trace memory to an external printer according to the detection output of the means.