JPH04246802A - Initialization system - Google Patents

Abstract

PURPOSE:To conduct automatic adjustment completely using an electric interface only without using the mechanical means such as a robot. CONSTITUTION:A switching circuit 6 is provided instead of a strap wire. The input terminal groups A1 to A3 of the switching circuit 6 are switched to B1 to B3 at the time of adjustment and after initializing by the switching signal sent from a switching control signal input terminal 5. Moreover, the fuses F1 to F3 are burnt out in accordance with the level of the data signal determined by the adjustment of the fuses F1 to F3 located in the resistance split circuits R1 to R6 located on the side of the input terminal groups A1 to A3 which will be selected after adjustment. As a result, the level of setting is fixed, and a complete automatic operation can be conducted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an initial setting method for adjusting electrical and electronic equipment.

0002

2. Description of the Related Art Conventional initial setting methods employ the following two methods. In the first method, variable components such as variable resistors or variable capacitors are used at locations that require individual adjustment for each device. In the second method,
A strap terminal is provided at a location where adjustment is required, and after adjustment, the strap terminal is fixed at a logic "H" level or logic "L" level.

0003

[Problems to be Solved by the Invention] However, with the conventional initial setting method, when trying to implement automation with simple equipment, except in the case of large-scale equipment using robots, it is difficult to The drawback is that manual adjustment is always required for adjustment work or strap terminal settings, making complete automation difficult.

An object of the present invention is to provide an initial setting method that allows automatic adjustment.

[0005]

[Means for Solving the Problems] The initial setting method according to the present invention includes a switching section that selects either one of the first and second input terminal groups to which a plurality of data signals are supplied by a switching control signal. , the data signal is supplied as is to the first input terminal group, and the second input terminal group is connected to a resistor divider circuit containing a fuse, and the data signal is supplied only when a setting signal is input. The fuse is blown according to the polarity of the signal.

[0006]

[Function] In the initial setting method of the present invention, a switching section is provided in place of the strap wire, and the first and second input terminal groups of the switching section are switched during adjustment and after initial setting by a switching control signal, and further, the first and second input terminal groups of the switching section are switched during adjustment and after initial setting. Complete automation is achieved by fixing the set level by blowing out the fuse included in the resistor divider circuit on the side of the second input terminal group that is later selected in accordance with the level of the data signal determined by adjustment.

[0007]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an initial setting method according to an embodiment of the present invention. FIG. 1 shows an example of a voltage dividing circuit in which the present invention is applied to a variable resistor. The variable resistor 2 includes switches SW1 to SW8 using eight MOS transistors and nine resistors r1 to r9. The variable resistor 2 divides the input voltage Vi supplied from the voltage input terminal 7, and
Output voltage Vo is output to voltage output terminal 8. resistance r1
~r9 has the relationship expressed by the following formula 1,
Corresponds to 8 positions of rotary variable resistor.

[0008]

[Math 1]

The switching circuit 6 selects either the input terminals A1 to A3 or the input terminals B1 to B3 according to the switching control signal supplied to the switching control signal input terminal 5. The selection logic enters the adjustment mode when the switching control signal input terminal 5 is set to the logic "L" level, and selects the input terminals B1 to B3. In this embodiment, the switching circuit 6 also includes a binary/decimal conversion function. If all input terminals B1 to B3 are at logic "L" level, output terminal Q1 is at logic "L" level, and if all input terminals B1 to B3 are at logic "H" level, output terminal Q8 is at logic "L" level. The other output terminals Q2 to Q7 remain at the logic "H" level.

During adjustment, the polarity of the data signals D1 to D3 supplied to the data signal input terminal 3 is changed to select the optimum value of the output voltage Vo output from the voltage output terminal 8. Now, let us assume that the case expressed by Equation 2 below is the optimal value.

[0011]

[Math 2]

In this case, the data signals D1 and 3 are set to logic “
The data signal D2 is set to a logic "H" level, and the output terminal Q3 of the switching circuit 6 is set to a logic "L" level.

At this time, only the transistor connected to the data signal input terminal that is at the logic "L" level is turned on, and the fuse is blown. In this embodiment, the fuses F1 and F3 are blown, and the input terminals A1 and A3 become the logic "L" level.

The resistors R1 to R6 have a relationship expressed by the following equation 3, and the input terminal A2 to which the fuse F2 is connected is at a logic "H" level.

[0015]

[Math 3]

Finally, the setting signal input terminal 4 and the switching control signal input terminal 5 are opened. Then, the switching control signal input terminal 5 becomes a logic "H" level due to the internal pull-up resistor, and the input signal group of the input terminals A1 to A3 is selected. The above operations complete the initial settings.

[0017]

As explained above, by using the initial setting method of the present invention, it becomes possible to perform automatic adjustment completely using only an electrical interface, without using mechanical means such as a robot.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an initial setting method according to an embodiment of the present invention.

[Explanation of symbols]

1 Switching section 2　Variable resistor 3 Data signal input terminal 4 Setting signal input terminal 5 Switching control signal input terminal 6 Switching circuit 7 Voltage input terminal 8 Voltage output terminal

Claims (1)

[Claims] 1. In a switching unit that selects either one of a first input terminal group and a second input terminal group to which a plurality of data signals are supplied in response to a switching control signal, the first input terminal group is provided with a plurality of data signals. The signal is supplied as is, and each of the second input terminal groups is connected to a resistor divider circuit containing a fuse, and the fuse is blown according to the polarity of the data signal only when a setting signal is input. An initial setting method featuring: