Seiko Epson Corporation

Nobuyuki Saito

Takuya Ishida

Kenyou Nagao

Tomonaga Hasegawa

Yukinari Shibata

Kuniaki Matsuda

Hiroaki Shimono

Shun Oshita

Shinsuke Kubota

Yoshimi Oka

Yoshiyuki Kamihara

Hironobu Kazama

Masahiko Mizuta

Takumi Oribe

Daisuke Sato

Masahiko Hirasawa

Hiroshi Iezaki

Yoshiki Katsuma

A printing system that enables an image processing apparatus to, in the configuration in which one printing apparatus is managed by a plurality of management apparatuses, obtain a suitable color profile from one of the management apparatuses.

Printing system, color profile management method, and management apparatus

Provided herein is a user authentication method in a monitoring system that communicates with electronic equipment and monitors the electronic equipment. The monitoring system performs processes including: demanding a user to perform predetermined authentication operation that gives rise to a change in running status of the electronic equipment; acquiring, from the electronic equipment, running information that indicates the running status of the electronic equipment, the running status having changed due to the authentication operation; detecting, on a basis of the running information, that the authentication operation has been performed in response to the demand; and permitting, upon detection, the user to access the running information acquired from the electronic equipment.

User authentication method, monitoring system, monitoring apparatus, and electronic equipment

An information mediation system includes a printer and an information mediation device which accumulates operation information that is modified according to an operation of the printer from the printer, in which the information mediation device has an operation information accumulating section which accumulates operation information of a type according to specifications of the printer from the printer, and a specification sensing section which senses a modification in the specifications of the printer, and the operation information accumulating section queries the type of operation information that is to be accumulated in a printer in which a modification of the specifications is sensed by the specification sensing section to an external management apparatus and accumulates the operation information of the type that is indicated by the query result from the printer in which the modification of the specifications is sensed.

Information mediation system, information mediation method, information accumulating system, and information processing method

A data transfer control device includes an OUT-transfer transmitter circuit which transmits OUT data by driving a serial signal line, a clock-transfer transmitter circuit which transmits a clock signal CLK by driving a serial signal line, a PLL circuit which generates the clock signal CLK, and a power-down setting circuit which sets a power-down mode. In a first power-down mode, the OUT-transfer transmitter circuit is set to the power-down mode, and the clock-transfer transmitter circuit is set to the power-down mode to stop a system clock signal of a target-side data transfer control device. In a second power-down mode, the OUT-transfer transmitter circuit is set to the power-down mode without setting the clock-transfer transmitter circuit to the power-down mode.

Data transfer control device and electronic instrument

A receiver circuit includes: a current/voltage conversion circuit which performs a current/voltage conversion based on current which flows through the differential signal lines and outputs voltage signals; a comparator which compares the voltage signals and outputs an output signal; a power-down detection circuit which, when the transmitter circuit transmits a power-down command by current-driving the differential signal lines in a normal transfer mode, detects the transmitted power-down command based on a comparison result from the comparator; and a power-down setting circuit which sets at least one of the current/voltage conversion circuit and the comparator to a power-down mode when the power-down command is detected.

Receiver circuit, interface circuit, and electronic instrument

A data transfer control device having: a hub dedicated data storage section which stores a packet transferred between the data transfer control device and a hub; a packet transmission section which cyclically issues a token packet to the hub for asking whether the state of the hub has changed or not; a packet reception section which receives a response packet sent from the hub in response to the token packet; and a transfer controller which writes the response packet received by the packet reception section into the hub dedicated data storage section, and generates an interrupt which indicates that the state of the hub has changed.

Data transfer control device, electronic instrument, and data transfer control method

A data transfer control device includes an OTG (state) controller which controls a plurality of states including a host operation state and a peripheral operation state, a host controller which is connected with a transceiver during the host operation, a peripheral controller which is connected with the transceiver during the peripheral operation, a register section including transfer condition registers which are used commonly during the host operation and the peripheral operation, and a buffer controller which controls access to a packet buffer used commonly by the host controller and the peripheral controller. Pipe regions PIPEto PIPEe are allocated in the packet buffer during the host operation, and endpoint regions EPto EPe are allocated in the packet buffer during the peripheral operation.

Data transfer control device, electronic equipment, and method for a data transfer through a bus, the data transfer control device including a register and a packet buffer that are commonly used during a host operation and a peripheral operation

When transfer condition information is set and the start of automatic control transfer is instructed, a transfer controller (host controller) automatically issues a setup stage transaction and automatically transfers a setup stage packet, then, if there is data to be transferred, it automatically issues a data stage transaction and automatically transfers a data stage packet. It then automatically issues a status stage transaction and automatically transfers a status stage packet. Device request data, the total size of transfer data, data stage present/absent information, transfer direction in the data stage, and maximum packet size are set in transfer condition registers. A pipe region is allocated in the packet buffer during host operation of USB On-The-Go.

Data transfer control device, electronic equipment, and data transfer control method

When a first mode (with-SOF mode) has been set, data transfer is performed while SOF packets are transferred at frame periods, and when a second mode (non-SOF mode) has been set and also non-periodic (bulk) transfer is being performed, the periodic transfer of SOF packets is disabled and non-periodic data is transferred. If there is no non-periodic data to be transferred, a SOF packet is transferred in the frame period, even if the second mode has been set. During host operation with USB on-the-go (OTG), pipe regions are allocated to the packet buffer, and non-periodic data is transferred automatically to or from end points while the periodic transfer of SOF packets is disabled. When all of the automatic transfer instruction signals of the pipe regions are inactive, SOF packets are transferred periodically even if the second mode has been set.

Data transfer control device for data transfer over a bus, electronic equipment and method for data transfer over a bus

Pipe regions PIPEto PIPEe (or endpoint regions) are allocated in a packet buffer, registers in which are set page sizes MPSto MPe (maximum packet size) and numbers of pages BPto BPe for the pipe regions are provided, and data is transferred between pipe regions and endpoints, region sizes RSto RSe of the pipe regions being set by the page sizes and numbers of pages. The page sizes and numbers of pages are set in registers that are used in common during both host operation and peripheral operation in accordance with the USB on-the-go standard. Transfer condition information such as transfer types TTto TTe is set in the registers, transactions with respect to the endpoints are automatically issued, and data is automatically transferred. Pipe regions are allocated in the packet buffer during host operation whereas endpoint regions are allocated during peripheral operation.

A transaction is automatically issued with respect to one of end points and data is automatically transferred while the remaining data size of the transfer data is calculated based on the total size and the maximum packet size. When the remaining data size in the current transaction is less than the maximum packet size, the next transaction is issued automatically, and a short packet is transferred automatically to nest one of the end points. When the payload size of the packet to be transferred by the current transaction is the maximum packet size and the remaining data size of the transfer data is zero, a short packet of zero data length is transferred automatically to the next one of the end points. When DMA transfer is complete and the remaining data to be transferred is zero, a short packet of zero data length is transferred automatically in response to an IN token from a host. Data transfer according to USB On-The-Go is performed.

A transmitter circuit including: a current driver which current-drives differential signal lines; and a voltage driver which is electrically disconnected from at least one of the differential signal lines in a normal transfer mode, and is electrically connected to the at least one of the differential signal lines and voltage-drives the at least one of the differential signal lines in a power-down mode. The voltage driver outputs a power-down voltage for setting a receiver circuit to the power-down mode or a wakeup voltage for canceling the power-down mode of the receiver circuit, to the at least one of the differential signal lines. The current driver transmits a power-down command to the receiver circuit by current-driving the differential signal lines in the normal transfer mode.

Transmitter circuit, receiver circuit, interface circuit, and electronic instrument

A data transfer control device including: a buffer controller which allocates a plurality of pipe regions in a packet buffer and controls access to the packet buffer; and a transfer controller which controls data transfer between the pipe regions and corresponding endpoints. The transfer controller performs processing of pausing data transfer between the pipe regions and the endpoints, the buffer controller performs reconstruction processing which includes at least one of deletion, addition, and size change of the pipe regions after the completion of the pause processing, and then the transfer controller resumes the paused data transfer after the reconstruction processing of the pipe regions. Data in the pipe regions before the reconstruction processing is copied to the pipe regions after the reconstruction processing while preventing the data from being erased.

Data transmission controller that restarts data transmission when reconstruction is completed

Data to be transferred from a BUS(IEEE 1394 or USB) is encrypted by a second encryption process (DES) and the encrypted data is written to an external SDRAM through an external terminal of a data transfer control device. The encrypted data that has been written to the SDRAM is read through the external terminal, and the thus-read encrypted data is transferred to a BUSto which an HDD is connected. Encrypted data transferred from the BUSis decrypted by a first decryption process (DTCP), and is written to a small-capacity SRAM within the data transfer control device. The thus-written decrypted data is read from the SRAM and encrypted by the second encryption process. Paths that bypass the second encryption (or decryption) are also provided.

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Sapporo, Japan

Nobuyuki Saito