JPH10247379A - Semiconductor memory card system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a semiconductor memory card system that can diel with even such a situation that plural kinds of power source voltage of a semiconductor memory card exist and that can give interchangeability. SOLUTION: This card system connects mutually a connector of the power source supply side of the system body and a connector of the semiconductor memory card side, and supplies power source voltage of the system body side to the semiconductor memory card. In this case, terminals (4P, 4J, 5P, 5J, 6P, 6J) of 3 pairs or more which is provided in a power source supply side connector (1) and semiconductor memory card side connectors (2A, 2B) attachably, detachablly and mutually, and of which one pair of terminal is made a ground terminal, a power source device (11, 12) applying voltage different values to terminals being different one another other than this common ground terminal. And the semiconductor memory card selects terminals (5L, 6J) corresponding to a prescribed voltage basing on the ground terminal (4J) as reference, and obtains operation voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor memory card system in which a power supply side connector of a system main body and a semiconductor memory card side connector are interconnected, and a power supply voltage of the system main body is supplied to the semiconductor memory card.

[0002]

2. Description of the Related Art FIG. 2 is a schematic diagram showing the configuration of a power supply connector of a semiconductor memory card system of this type.
Are connected to each other. The power supply side connector 1 is of a plug type, and includes a power terminal 3P and a ground terminal 4P.
P, the semiconductor memory side connector 2 is a jack type, and has a power terminal 3J and a ground terminal 4J.
When the semiconductor memory card is inserted into the system body, the power terminal 3J is connected to the power terminal 3P, and the ground terminal 4J is connected to the ground terminal 4P. In the system main body having the power supply connector 1, the ground terminal 4P is grounded, and the DC power supply 11 is connected between the ground terminal 4P and the power terminal 3P. Thus, the operation voltage of the semiconductor memory card can be obtained by connecting both connectors.

[0003]

Recently, the power supply voltage of a semiconductor memory card has become lower as the voltage of the semiconductor device itself becomes lower. At present, the power supply voltage is 5.0 V and 3.3 V, respectively. There are two types of semiconductor memory cards used as voltages, and the supply voltage on the system body side is changed according to the difference in the power supply voltage.

However, in the conventional semiconductor memory card system, in order to prevent improper voltage from being applied to the semiconductor memory card, the power supply side connector 1 and the semiconductor memory side connector having different shapes according to the operating voltage. 2
Was used. For this reason, it is necessary to use a plurality of types of connectors having different shapes depending on a difference in power supply voltage, and this leads to a decrease in productivity.

The present invention has been made in consideration of the above circumstances, and can easily cope with a case where there are a plurality of types of power supply voltages of a semiconductor memory card, and provide a power supply side connector with compatibility. It is an object of the present invention to provide a semiconductor memory card system capable of performing the above.

[0006]

According to a first aspect of the present invention, there is provided a semiconductor memory card system, wherein a power supply side connector of a system main body and a semiconductor memory card side connector are connected to each other, and a power supply of a system main body side is provided. In supplying a voltage to the semiconductor memory card, the power supply connector and the semiconductor memory card connector are provided so as to be able to be connected to and separated from each other, and three or more sets of terminals having one set of terminals as ground terminals; A power supply device for applying different voltages to different terminals other than the common ground terminal, the semiconductor memory card corresponding to a predetermined voltage with respect to the ground terminal. Since the operating voltage is obtained by selecting the terminal, even when there are plural kinds of power supply voltages of the semiconductor memory card, it can easily cope with the case, and It can be made compatible.

According to a second aspect of the present invention, in the semiconductor memory card system, the power supply device provided in the system body applies two types of voltages to different terminals other than the common ground terminal when viewed from the common ground terminal. So,
It is possible to provide a low-cost device that matches the recent situation associated with the reduction in the voltage of the semiconductor device itself.

In the semiconductor memory card system according to the third aspect of the present invention, the power supply side connector is a plug type and the semiconductor memory card side connector is a jack type. Is secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on preferred embodiments. FIG. 1 is a schematic configuration diagram of one embodiment of the present invention. In the drawing, the same elements as those of FIG. 2 showing a conventional semiconductor memory card system are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, as shown in (b), a semiconductor memory-side connector 2A of a semiconductor memory card having an operating voltage of 5.0 V is connected to the power supply-side connector 1 of the system body shown in (a), or ( As shown in (c), the operation voltage is to connect the semiconductor memory side connector 2B of the semiconductor memory card of 3.3V.

The power supply connector 1 shown in FIG. 1A is of a plug type, and includes a ground terminal 4P, a power terminal 5P.
And a power terminal 6P, of which the ground terminal 4P is grounded, and between the ground terminal 4P and the power terminal 5P,
A power supply device 11 having an output voltage of 5.0 V is connected, and a power supply device 12 having an output voltage of 3.3 V is connected between the ground terminal 4P and the power supply terminal 6P. Therefore, the ground terminal 4P
Is a common ground terminal for the power supplies 11 and 12.

On the other hand, the semiconductor memory-side connector 2A shown in FIG. 1B is a jack type and includes a ground terminal 4J, a power terminal 5J and a power terminal 6J, of which a voltage between the ground terminal 4J and the power terminal 5J is provided. Is set to the operating voltage, and a subsequent circuit (not shown) is connected, and the power supply terminal 6J is in an unconnected state, that is, in an idle state.

Further, the semiconductor memory side connector 2B shown in (c) is also of a jack type and includes a ground terminal 4J, a power terminal 5J and a power terminal 6P, and among these, the voltage between the ground terminal 4J and the power terminal 6J. Is set to the operating voltage, and the subsequent circuit (not shown) is connected, and the power supply terminal 5J is in an unconnected state, that is, in a play state.

When the semiconductor memory side connector 2A is connected to the power supply side connector 1, the circuit connected to the semiconductor memory side connector 2A operates by the 5.0V voltage supplied from the power supply device 11, If the semiconductor memory side connector 2B is connected to the power supply side connector 1,
The circuit connected to the semiconductor memory side connector 2B operates by the voltage of 3.3V supplied from the power supply device 12.

Thus, according to the above embodiment, the semiconductor memory card 2A having an operating voltage of 5.0V and the memory card 2B having an operating voltage of 3.3V have the ground terminals 4 respectively.
Since the power supply terminal 5J or the power supply terminal 6J corresponding to its own operation voltage is selected based on J to obtain the operation voltage, even when there are two types of power supply voltages of the semiconductor memory card, it is possible to easily cope with the case. In addition, compatibility can be provided.

Further, since the power supply side connector is a plug type and the semiconductor memory card side connector is a jack type, the safety of the semiconductor memory card at the time of carrying is ensured.

In the above-described embodiment, the configuration in which the operation voltage is applied to two types of semiconductor memory cards has been described. For the power supply side connector and the semiconductor memory card card side connector, a connector having at least three sets of terminals having at least one set of terminals as ground terminals is used, and this ground terminal is used as a common ground terminal in the system body. If a power supply device for applying different voltages to other different terminals is provided, and each semiconductor memory card selects a terminal corresponding to a predetermined voltage with reference to a ground terminal to obtain an operating voltage, The same operation as described above can be performed.

[0017]

As is apparent from the above description, according to the semiconductor memory card system according to the first aspect of the present invention, a pair of terminals which are mutually connected and separated from each other are grounded. The system body has a ground terminal as a common ground terminal, and a power supply device for applying different voltages to different terminals other than the common ground terminal is provided on the system body, while the semiconductor memory card is provided with The terminal corresponding to its own operating voltage is selected based on the ground terminal to obtain the operating voltage, so that even when there are plural types of power supply voltages of the semiconductor memory card, it is possible to easily cope with it and to improve compatibility. You can have.

According to the semiconductor memory card system of the second aspect of the present invention, two kinds of voltages are applied to different terminals of the system main body. There is also an effect that a low-cost product that matches the situation described above can be provided.

According to the third aspect of the present invention, the power supply side connector is a plug type and the semiconductor memory card side connector is a jack type. The effect of ensuring safety is also obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a power supply connector of a conventional semiconductor memory card system.

[Explanation of symbols]

 1 Power supply side connector 2A, 2B Semiconductor memory side connector 4P, 4J Ground terminal 5P, 6P, 5J, 6J Power supply terminal

Claims (3)

[Claims] In a semiconductor memory card system for connecting a power supply connector of a system body and a connector of a semiconductor memory card to each other and supplying a power supply voltage of the system body to the semiconductor memory card, the power supply connector and the semiconductor memory card are connected to each other. Three or more sets of terminals provided on the semiconductor memory card side connector so as to be able to be connected to and separated from each other, one set of terminals being a grounding terminal, and provided on the system body, the grounding terminal being a common grounding terminal; A power supply for applying different voltages to different terminals other than the terminals,
The semiconductor memory card system according to claim 1, wherein a terminal corresponding to a predetermined voltage is selected based on the ground terminal to obtain an operating voltage. 2. The power supply device provided in the system body applies two types of voltages to different terminals other than the common ground terminal as viewed from the common ground terminal. Semiconductor memory card system. 3. The semiconductor memory card system according to claim 1, wherein said power supply side connector is a plug type, and said semiconductor memory card side connector is a jack type.