Hitachi, Ltd.

Hitachi Vlsi Engineering Corp.

Takashi Kumagai

Kazuo Sugai

Tatsuo Kanetake

Kazuhiro Sato

Takeo Yamada

Mitsuo Usami

Kanji Otsuka

Takayuki Okinaga

Shigeo Kuroda

Masao Kato

Kunizo Sahara

Takuo Ishizuka

Seiji Miyamoto

Yuuji Shirai

Tsutomu Sumimoto

Hiroshi Tachi

Toshihisa Taniguchi

Masayuki Kawashima

Tadatsugu Ishizuka

Kazutoshi Kubo

The present invention relates to a packet transfer unit, which comprises a search key memory that stores a search key for a transfer destination of a packet and verification information generated from the search key, in association with a storage location of transfer information memorized in a transfer information memory, wherein a transfer information acquisition unit searches the search key memory by using the search key generated based on the header information and the verification information generated from the search key, acquires storage location information of the transfer information from the search key memory when a match with the search key and the verification information memorized in the search key memory is found, and acquires the transfer information stored in the transfer information memory based on the acquired storage location information, and wherein a transfer unit transfers the packet based on the acquired transfer information.

Packet transfer unit

Attempts have been made to increase the number of pins of packages accompanying the trend toward fabricating integrated circuits highly densely and in smaller sizes. The present invention provides technology for improving reliability in fabricating packages of the surface-mounted type that have increased number of pins. That is, when the packages are mounted on the wiring substrate, the lead pins that receive load from the axial direction exhibit bending strength which is smaller than the junction strength of solder at the junction portions. To achieve this object, the lead pins are made of a material having large resiliency such as a fiber-reinforced material, a transformation pseudo elastic material, an ultra-high tension material, or a heat-resistant ultra-high tension material.

Semiconductor device having leads for mounting to a surface of a printed

A memory access control system for an information processing apparatus having a buffer memory and a main memory wherein when a store or access request is generated, in the case where the data block in the address to be accessed does not exist in the buffer memory, the store requested data from a data register is written into the buffer memory before the first data in the data block read out from the main memory is written into the buffer memory, and the data register is released to receive the next request.

Advanced store-in system for a hierarchy memory device

A data searching apparatus has a storage unit for storing a record having a plurality of fields, a first register for setting a compare condition and compare data for the fields, a compare circuit for comparing the fields of the record transferred from the storage unit with the compare data in accordance with the compare condition, a logical operation circuit for logically operating on the compare results of the compare circuit to check if the fields meet the compare condition, a buffer memory for storing the content of the record, a second register for setting attributes of the fields of the record, and control circuit for writing only those fields of the record which are determined by the logical operation circuit to meet the compare condition into the buffer memory in accordance with the attributes of the fields.

Data searching apparatus

Growing community of inventors

Isehara, Japan

Takashi Kumagai