US 4,849,944 AGranted

Connecting structure for connecting a memory unit to a memory unit controller

AssigneeTokyo Electric Co., Ltd.

InventorTsuyoshi Matsushita

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Abstract

Grounding terminals of a memory unit are disposed at the opposite ends of an array of signal terminals of the memory unit, respectively, reception grounding terminals of a connector are disposed at the opposite ends of any array of reception signal terminals of the connector, respectively, the grounding terminals of the memory unit are connected to the reception grounding terminals of the connector, respectively, before the signal terminals of the memory unit are connected to the reception signal terminals of the connector in inserting the memory unit in the connector. Upon the insertion of the memory unit in the connector, the static electricity accumulate in the memory unit is discharged surely to a ground without affecting the semiconductor memory of the memory unit through the signal terminals and the reception signal terminals.

Claims14

Dependent claims

A connecting structure for electrically connecting a memory unit to an external control circuit, said connecting structure comprising:

a connector means having a plurality of in-line reception information signal terminals arranged in a straight line and connected to a control circuit, reception grounding terminals disposed at the opposite sides of said plurality of in-line reception information signal terminals, respectively, and connected to a ground;
and
a memory terminal arrangement provided in a memory unit having an optionally reloadable semiconductor memory and adapted to be inserted in said connector, said memory terminal arrangement comprising:
a plurality of in-line output information signal terminals to be respectively connected to said reception information signal terminals, said in-line output signal terminals arranged along one side of said memory unit;
and, output grounding terminals disposed at the opposite ends of said plurality of said output information terminals, respectively, so as to be connected to said reception grounding terminals prior to said output information signal terminals being connected to said reception information signal terminals when said memory unit is inserted in said connector means.

2 more elements

A connecting structure for electrically connecting a memory unit to an external control circuit, said connecting structure comprising:

a connector having a plurality of in-line reception information signal terminals connected to a control circuit, reception check terminals connected to said control circuit and reception grounding terminals connected to a ground;
and
a terminal arrangement provided in a memory unit having an optionally reloadable semiconductor memory, said terminal arrangement including output information signal terminals to be connected to said reception information signal terminals, respectively, arranged along one side of said memory units, output grounding terminals to be connected to said reception grounding terminals, respectively, arranged along said one side of said memory units, and, output check signal terminals arranged so as to be connected to said reception check signal terminals after said output information signal terminals have been connected to said reception information signal terminals, respectively and after said output grounding terminals have been connected to said connection grounding terminals.

A memory system comprising:

a connector including a plurality of reception information signal terminals arranged in a straight line and connected to a control circuit, reception check signal terminals connected to said control circuit, and reception grounding terminals connected to a ground;
a switching device interposed between an electrically connected to said control circuit and to said reception information signal terminals;
a delay circuit interposed and electrically connected to said control circuit and to said reception check signal terminals, and adapted to provide a signal to close said switching circuit upon the reception of a connection signal through said reception check signal terminal;
and
a memory unit including a reloadable semiconductor memory, a terminal arrangement disposed on one side of said reloadable semiconductor memory and including output information terminals to be connected to said reception information signal terminal, respectively, output grounding terminals to be connected to said reception grounding terminals, and output check signal terminals arranged so as to be connected to said reception check signal terminals after the output information signal terminals have been connected to said reception information signal terminals, respectively, and after said output check signal terminals have been connected to said reception check signal terminals, respectively.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/085,187Filed 14 Aug 1987
Priority: JP 61-19255818 Aug 1986
Granted: 18 Jul 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H05K 1/117
Printed elements for providing electric connections to or between printed circuits: pads along the edge of rigid circuit boards, e.g. for…
G11C 5/143
Power supply arrangements , e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels: detection…
H05K 1/0268
Marks, test patterns or identification means: for electrical inspection or testing
H05K 2201/0746
High voltage adaptations: protection against transients, e.g. layout adapted for plugging of connector