JPH0295285A - Checkout box with logic level setting function - Google Patents

Abstract

PURPOSE:To easily set an optional level and to improve the efficiency of level setting operation by providing the setting function for a high and a low logic level required for substrate inspection. CONSTITUTION:If the connector from a module to be tested is a socket type, the connector is connected to the pin connector of a pin connector panel 2. When its signal is an output signal, three-terminal switches 7 and 8 are set open. When the level is set high with the input signal, the three-terminal switch 7 is placed in the pull-up state and the three-terminal switch 8 is set or the pin switch 6 is pulled out. Thus, an optional pin can be set high, low, or open. When an optional terminal of the checkout box is used as an input terminal, the switch of the corresponding terminal is set to set a desired high or low level. Consequently, the efficiency of the level setting operation is facilitated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a checkout box with a logic level setting function, and is particularly useful in functional tests and module inspections of boards without electronic components mounted thereon. Regarding the checkout box with logic level setting function, which is used as a relay box with a monitor terminal and used as a terminal point to set the input to the board or monitor the output of the board externally. .

[Conventional technology]

Traditionally, this type of checkout box simply provides a terminal point with a terminal at the end for monitoring the output obtained through the board's connector or for inputting a signal from outside the board. Met.

In order to clearly check the digital circuit on the board, it is necessary to process the input signal or set an arbitrary level of high (Hi) or low (Lo).

Conventionally for this purpose, Hi/L is input from another device via the checkout box's monitor pin.

A level input signal was input to the board.

[Problem to be solved by the invention]

The conventional checkout box described above does not have a logic level setting function, so if this is necessary, when inputting the level signal setting, pull up (PULL UP) or pull down (FULL DO) to one monitor terminal.
Inputs were input from the outside via a WN> resistor by connecting Hi/Lo level cables with alligator clips, by soldering, or by using a special connector cable.

For this reason, there are disadvantages in that a lot of time is spent on setting Hi/Lo, and the cables are complicated and work efficiency is deteriorated.

Furthermore, when changing the monitor connector, it is necessary to repeat the above setting work from the beginning, which reduces work efficiency.

[Means to solve the problem]

The invented checkout box with logic level setting function is a checkout box that provides an input to the connector of the board when testing the functionality of a board on which electronic components are mounted, and also provides a terminal point when monitoring the output of the board. The outbox is configured with a high/low logic level setting function necessary for the board inspection.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of one embodiment of the present invention.

The embodiment shown in Figure 1 has a D-sub connector of 37.25°15.
The example is a checkout box for each bin and socket.

In FIG. 1, reference numeral 1 indicates a connector for connection from a module, reference numeral 2 indicates a bin type connector panel, and reference numeral 3 indicates a socket type 0 connector panel, each of which has a bin type connector and a socket type connector. 4 and 5 are bin type connectors.

This is a monitor terminal that is directly connected to a socket type connector and is used to monitor signals.

6 is a bin switch for separating the bottle side and the socket side, and separation can be realized by pulling out this bottle. 7 sets the level of monitor terminal 4 on the pin side to Hi and Lo.
, 0PEN, and 8 is a three-terminal switch for setting the level of the monitor terminal on the connector side. 7 and 8 are switches each having three contacts, and a pull-up resistor 9. It is a switch terminal connected to a power supply, GND (ground), and OPEN via a pull-down resistor 10. FIG. 2 is an enlarged perspective view of the switch portion of FIG. 1.

FIG. 3 is a circuit diagram of the checkout box of this embodiment. 9 and 10 indicate a group of pull-up and pull-down resistors. One end of this resistor group is connected to a power source, a hot line, and ground (GND).

Next, the operation of this embodiment will be explained.

If the connector from the module under test is a socket type, connect it to the bin connector on the bin connector panel 2 in FIG. If this signal is an output, the three-terminal switch 7.8 is set to OPEN.

Also, when setting the input signal to high (Hi) level,
Set the 3-terminal switch 7 to pull-up and the 3-terminal switch 8 to 0PEN, or disconnect the pin switch 6. In this way, high, low, and open settings can be made for any bin.

In this way, when any terminal of the checkout box is used as an input terminal, desired high and low levels can be set by setting the switch of the corresponding arbitrary terminal.

Furthermore, when used as an output terminal or when there is no need to set it as an input terminal, it can be opened by operating a switch, and the connected circuit will not be affected in any way.

Furthermore, this checkout box is compatible with both bottle type connectors and socket type connectors, and is equipped with a switch to disconnect these two connectors.

〔Effect of the invention〕

As explained above, in the present invention, when it becomes necessary to set the terminals of the conventional checkout box connector to high and low levels, the terminals can be set using a dedicated cable and connector from the high and low level setting device, or The work that used to involve connecting the level signal directly to the corresponding monitor terminal by clipping or soldering can now be done easily by setting a switch, which eliminates the need to spend a lot of time setting the level. This has the effect of making it easier and more efficient to do the work that was previously done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the checkout box of the present invention, FIG. 2 is an enlarged perspective view of the switch section of the embodiment of FIG. 1, and FIG.
The figure is a circuit diagram of the embodiment of FIG. 1. DESCRIPTION OF SYMBOLS 1... Connector, 2... Pin type conerta panel, 3... Socket type connector panel, 4... Pin side monitor terminal, 5... Socket side monitor terminal, 6...
...Vin switch, 7,8...3 terminal switch, 9
...Pull-up resistor, 10...Pull-down resistor.

Claims (1)

[Scope of Claims] A checkout box for providing input to a connector of the board during a functional test of a board on which electronic components are mounted and for providing a terminal point for monitoring the output of the board, comprising: a checkout box necessary for the board test; A checkout box with a logic level setting function, which is characterized by being equipped with a high/low logic level setting function.