JPS6212871A - Device for analyzing waveform of continuous operation - Google Patents

Abstract

PURPOSE:To execute the analysis of a defect, the inspection of a circuit operation margin or the analysis of the continuous operation waveform of an optional IC by continuously storing the waveform of operation apparently while controlling a program temporary stop terminal. CONSTITUTION:When the program temporary stop terminal in a device E to be analyzed at its waveform is controlled by a waveform analyzer A, the program is temporarily stopped and the operation waveform of the analyzer A is inputted to a memory of a waveform storage device B having a small memory capacity. When the memory becomes full of data, the program in the device E is temporarily stopped by controlling the program temporary stop terminal and the contents stored in the device B are transferred to a waveform analysis storing device C. After the completion of the transfer, the program is automatically started and data are stored in the device B and then transferred to the device C. Since the operation waveform of the device E can be apparently continuously stored by repeating said operation, the stored contents are outputted to a waveform output device D to execute waveform analysis.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous operation waveform analysis device, particularly for analyzing continuous operation waveforms of a circuit whose program operation can be forcibly stopped temporarily from the outside. This invention relates to a continuous operation waveform analysis device.

[Conventional technology]

Traditionally, logic analyzers or storage oscilloscopes were used as continuous operation waveform analysis devices.
The memory capacity was small and the waveform analysis range was narrow.

[Problem that the invention seeks to solve]

That is, the conventional continuous operation waveform analyzer has a small memory capacity and cannot store long-term continuous operation waveforms, so it is difficult to confirm the operating margin of the circuit and it is difficult to discover intermittent failures due to poor margins.

[Means for solving problems]

The continuous operation waveform analysis device of the present invention captures the operating waveform of a device that can temporarily stop a program by controlling a specific signal terminal into the memory of a waveform storage device with a small memory capacity. control,
The program is temporarily stopped and the memory contents are transferred to the storage device of the analysis device. After the transfer is completed, the program is automatically restarted, stored in the memory of the waveform storage device, and transferred to the waveform analysis storage device. It has a feature that it is possible to perform waveform analysis after repeating the above operations and apparently continuously storing the program operations.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

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

The continuous operation waveform analysis device shown in FIG. 1 includes a waveform analysis device A, a waveform storage device B, a waveform analysis storage device C, a waveform output device, a waveform analysis device E, and a waveform transmission cable.
*b t Ct d and control signal cape"'le
eRe' m gl+ gtt h.

FIG. 2 is a time chart showing the operating waveforms of each part shown in FIG. 1, including the control signal operating waveforms F, G, I (, I).

J, L, M, and N are operating waveforms of control signals of the waveform analysis device and waveform storage device.

Next, the operation will be explained with reference to FIGS. 1 and 2.

In the initial state, a program (positive signal I) is sent from the waveform analysis device A through the control signal cable f, and the program temporary stop terminal of the waveform analysis device E is forcibly set to low, thereby temporarily stopping the program.

In response to the operation waveform memory start signal N, the program stop signal controller sends a high signal of the memory start signal F through the control signal cables f and e, and the waveform analysis device [
Start the program E and the memory import of the waveform storage device B, and send the high signal of the write enable signal J that makes the waveform analysis storage device C writable to the control signal cable g.
Send it through. When the memory full signal G indicating that the memory capacity of the waveform storage device B is full is generated, the high signal of the memory full signal H is transmitted to the control signal cable e2.
is sent to waveform analyzer A through
The program of the waveform analysis device E is temporarily stopped. When the program stop signal I becomes low, the memory contents of the waveform storage device B are transferred to and stored in the waveform analysis storage device C through the waveform transmission cable b1, the waveform analysis device A1, and the waveform transmission cape AC.

When the external storage signal K becomes low, a transfer completion signal is sent to the waveform analysis device A through the control signal cable gx to indicate that the transfer is completed.

When the high signal of the transfer completion signal is received, the waveform analyzer A
outputs a memory retrieval restart signal M for the program and waveform storage device tB.

By repeating the above operation, the waveform analysis device fE
The operating waveforms of can be stored seemingly continuously. The contents stored in this manner are output to a waveform output device for waveform analysis.

〔Effect of the invention〕

The continuous operation waveform analysis device of the present invention is a waveform storage device with a small memory capacity and can store program operation waveforms seemingly continuously, making it easy to analyze failures, investigate circuit operation margins, or analyze continuous operation waveforms of arbitrary ICs. This has the effect of shortening the failure analysis time and shortening the development period of an IC acceptance inspection program.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a time chart showing operation waveforms of each part shown in FIG. A: waveform analysis device, B: waveform storage device, C: waveform analysis storage device, D: waveform analysis storage device
waveform output device, E...waveform analysis device, a,
b, c, d...Yeple for waveform transmission, e1*
eRe' + gl* gxt h"""Control signal cable, F...Memory start signal, G...
...Memory full signal, I work...Memory full signal, Work...Program stop signal, J...
...Writable signal, K...External storage signal, L...
...Transfer completion signal, M...Restart signal, N...Operation waveform memory start signal.

Claims (1)

[Claims] A continuous operation waveform analysis comprising: a program control device that temporarily stops by controlling a specific signal terminal; and a waveform storage device that continuously stores the operating waveform of the program control device while controlling the specific signal terminal. Device.