Nec Corporation

Japan Aviation Electronics Industry, Limited

Satoru Nagase

Osamu Hashiguchi

Masahiro Yamada

Toshihiko Maeda

Yoshinori Mizusawa

Shin Kamiyamane

A memory access control device includes: an in-process number calculating unit that calculates an in-process number, which is a number of in-process load requests, at a predetermined time to a memory network; a reply number calculating unit that calculates a number of replies of the load requests received in a predetermined period from the predetermined time; an issuance number limitation unit that calculates an issuance limit value of the load requests in the predetermined period; an update determination unit that decides the issuance limit value regarding a next period on a base of the in-process number, the number of replies, and the issuance limit value in the predetermined period; and a hold determination unit that outputs a hold instruction of the load requests to a request pipeline connected to the memory network when the in-process number is larger than the issuance limit value regarding the next period.

Memory access controller, memory access control method, and recording medium stored with program

A connector engaging/disengaging mechanism comprises a frame member (,) and connector carriers (,) for engaging and disengaging first connector (,) mounted on a printed circuit board (,) fixed onto the frame (,) and second connectors (,) held on said connector carriers (,). The frame member is provided with guide grooves (,) in which the connector carriers (,) are received to be slidable in an engaging direction (A) and a disengaging direction (B). Each of the connector carriers (,) has connector holding portions for holding the second connectors and an operating portion (,) for moving the connector carrier to engage and disengage the second connectors (,) to and from the first connector (,). When the operating portion (,) is manually operated to move the connector carrier in the engaging direction, the second connectors (,) are connected with the first connectors (,). When the connector carrier is moved in the disengaging direction, the second connectors (,) are disconnected from the first connectors (,).

Connector engaging/disengaging device accommodating a plurality of connector pairs to mate with each other

A connecting structure of an electrical supply bus, by which a power supply module or a logic package is easily mounted in a case for an electronic device. The connecting structure of an electrical supply bus consists of: guide rails provided with a plurality of wedge-like spaces; a plurality of wedge-like blocks respectively accommodated in the plurality of wedge-like spaces; a stepped shaft which is inserted into a through hole provided in each of the guide rails and has a plurality of thick shaft portions; and an electrical supply bus facing the guide rails. An external thread portion of the stepped shaft is fitted into an internal thread portion of the guide rail. Thus, when the operating portion is rotated, the stepped shaft moves in the direction of said shaft. Then, each of the thick shaft portions moves a corresponding one of the wedge-like blocks. Thus, each of the wedge-like blocks pushes the electrical supply bus against the guide rails.

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Tokyo, Japan

Satoru Nagase