Hitachi, Ltd.

Hitachi Engineering Co., Ltd.

Hitachi Haramachi Electronics Co., Ltd.

Takamasa Fujinaga

Shigeo Kuboki

Hiroshi Ichige

Yoshiaki Kazawa

Masato Nagao

Yoshiaki Ajima

Isao Saitoh

Keizou Wase

Yoshinori Atsuwata

Yoshiyasu Ito

Satoko Iwama

Yoshiaki Homitsu

The communication control device allows a plurality of data items to be transferred to and from external devices, such as a CPU and a memory, via an external bus having a different data bus width in DMA (direct memory access) transfer mode. DMA transfer is controlled by the DMA controller provided in the communication control device. The DMA controller produces a signal indicating that a plurality of data items are continual.

Communication control device and a communication system using the same

In a nuclear fusion device having a torus type vacuum shell around which toroidal coils and poloidal coils are wound and arranged and whose interior is maintained in a high vacuum state, the bending rigidity of a shell wall in a circular cross section of the vacuum shell is made higher on the outer periphery side than on the inner periphery side of the circular cross section, thereby to prevent any deformation of the vacuum shell due to a magnetic force and any damage of the shell attendant upon the deformation in a process in which the coils are energized to confine a plasma within the vacuum shell. Moreover, without increasing the inner diameter of the circular cross section of the vacuum shell, the coils are located in proximity to the plasma so as to enhance the plasma producing efficiency.

Torus type vacuum shell

Growing community of inventors

Hitachi, Japan

Takamasa Fujinaga