Renesas Electronics Corporation

Renesas Technology Corp.

Synaptics Japan Gk

Yuri Azuma

Goro Sakamaki

Takahiro Suzuki

Kazumasa Yanagisawa

Tatsuya Ishii

Yoshihiko Yasu

Shin Morita

Shigeru Ota

Yasuto Igarashi

Takashi Kuraishi

Provided are a touch display control device and an information terminal device, which are arranged so that the noise resulting from the actions for activation and display on a display panel, and the noise caused by the actions of activation and detection on a touch sensor never affects each other, and are useful for suppressing the elicitation of the difference in brightness attributed to non-display in a display frame. The information terminal device includes: a display controller operable to change start timings of display and non-display periods in a cycle of a frame synchronizing signal of a display frame, in each cycle of the frame synchronizing signal or each sequence of cycles thereof; and a touch panel controller operable to perform the activation of a touch panel and a touch detection during the non-display period.

Touch-display control device and personal data assistant

The present invention is to provide a semiconductor device that can correctly switch endians on the outside even if the endian of a parallel interface is not recognized on the outside. The semiconductor device includes a switching circuit and a first register. The switching circuit switches between whether a parallel interface with the outside is to be used as a big endian or a little endian. A first register holds control data of the switching circuit. The switching circuit regards the parallel interface as the little endian when first predetermined control information, that is unchanged in the values of specific bit positions even if its high-order and low-order bit positions are transposed, is supplied to the first register, and regards the parallel interface as the big endian when second predetermined control information, that is unchanged in the values of specific bit positions even if its high-order and low-order bit positions are transposed, is supplied to the first register. Whatever the endian setting status, the control information can be correctly inputted without being influenced by the endian setting status.

Semiconductor device and data processing system selectively operating as one of a big endian or little endian system

A semiconductor device correctly switches endian modes regardless of the current endian mode of an interface. The semiconductor device includes a switching circuit and a first register. The switching circuit switches an interface to be used in big endian or little endian mode. The first register holds control data of the switching circuit. The switching circuit sets the interface in little endian mode when first predetermined control information is supplied to the first register, and sets the interface in big endian mode when second predetermined control information is supplied to the first register. The control information can be correctly inputted without being influenced by the endian setting status.

A semiconductor device correctly switches endian modes regardless of the current endian mode of an interface. The semiconductor device includes a switching circuit and a first register. The switching circuit switches an interface tote used in big endian or little endian mode. The first register holds control data of the switching circuit. The switching circuit sets the interface in little endian mode when first predetermined control information is supplied to the first register, and sets the interface in big endian mode when second predetermined control information is supplied to the first register. The control information can be correctly inputted without being influenced by the endian setting status.

In a semiconductor integrated circuit device of a liquid crystal display drive controller, the present invention is intended to suppress an increase in the number of output terminals for interface control signals for control of parallel interface to a sub liquid crystal display controller. A host interface circuit comprises a first serial interface circuit for serial data input and output in a differential manner, a parallel interface circuit, and other interface circuits. When the first serial interface circuit is selected for use as the host interface, the host interface circuit outputs in parallel predetermined information input via the first serial interface circuit from the parallel interface circuit to outside and generates interface control signals for the parallel output. External terminals for host interface assigned to the other interface circuits are used for double duty to output the interface control signals.

Semiconductor integrated circuit device and mobile terminal device

A semiconductor integrated circuit device enhanced in design efficiency while achieving multi-functionalization and power saving is to be provided. The semiconductor integrated circuit device has first through third circuit blocks, and is placed in a first power supply state in which the operation of internal circuits in the first circuit block is guaranteed in accordance with an instruction from the third circuit block or a second power supply state in which the operation of the internal circuits is not guaranteed. The second circuit block has an input unit which receives signals supplied from the first circuit block, and the input unit of the second circuit block has an input circuit which, in accordance with a control signal sent from said third circuit block to said second circuit block, causes a specific signal level to be maintained in compliance with the operating voltage of the second circuit block irrespective of the signal supplied from the first circuit block when the third circuit block instructs the second power supply state to the first circuit block.

Growing community of inventors

Tokyo, Japan

Yuri Azuma