摘要:
A data control device includes: a switch portion that has a plurality of first terminals on an upstream side, a plurality of second terminals on a downstream side, and a circuit portion that optionally switches a connection between the first terminals and the second terminals based on an external switching signal; and at least one control portion that has a first input/output portion on the upstream side and a second input/output portion on the downstream side, wherein the second input/output portion is connected to the first terminal of the switch portion and the first input/output portion is connected to the second terminal of the switch portion, and wherein the at least one control portion controls an input/output of data between the first input/output portion and the second input/output portion.
摘要:
A data control device includes: a switch portion that has a plurality of first terminals on an upstream side, a plurality of second terminals on a downstream side, and a circuit portion that optionally switches a connection between the first terminals and the second terminals based on an external switching signal; and at least one control portion that has a first input/output portion on the upstream side and a second input/output portion on the downstream side, wherein the second input/output portion is connected to the first terminal of the switch portion and the first input/output portion is connected to the second terminal of the switch portion, and wherein the at least one control portion controls an input/output of data between the first input/output portion and the second input/output portion.
摘要:
A storage system includes: a plurality of data input and output parts through; a data storing part that stores the data inputted and outputted through the plurality of data input and output parts; a range information storing part that stores range information; first control part controlling the data storing part to read and write the data in accordance with the stored range information, and that rewrites the stored range information to predetermined range information in a case where a prescribed signal is inputted from the data input and output part; and a plurality of second control parts that are provided correspondingly to the plurality of data input and output parts to input and output the data, and that input the prescribed signal to the data input and output parts in a prescribed case.
摘要:
A data transmission apparatus includes a packet generation section, a frame encoding section, a transmission section, a reception section, a frame decoding section and a packet extraction section. The packet generation section generates a packet upon request. The frame encoding section generates a frame having a predetermined length by dividing the packet or adding dummy data to the packet and generates an error-correcting-code-added frame by adding an error correcting code to the frame. The transmission section transmits the generated error-correcting-code-added frame through a transmission line. The reception section receives the error-correcting-code-added frame. The frame decoding section performs an error detection and an error correction for the error-correcting-code-added frame. The packet extraction section extracts the packet by removing the error correcting code from the error-correcting-code-added frame for which the error detection and the error correction have been performed.
摘要:
A data transmission apparatus includes a packet generation section, a frame encoding section, a transmission section, a reception section, a frame decoding section and a packet extraction section. The packet generation section generates a packet upon request. The frame encoding section generates a frame having a predetermined length by dividing the packet or adding dummy data to the packet and generates an error-correcting-code-added frame by adding an error correcting code to the frame. The transmission section transmits the generated error-correcting-code-added frame through a transmission line. The reception section receives the error-correcting-code-added frame. The frame decoding section performs an error detection and an error correction for the error-correcting-code-added frame. The packet extraction section extracts the packet by removing the error correcting code from the error-correcting-code-added frame for which the error detection and the error correction have been performed.
摘要:
A data transfer apparatus includes a transmitting unit, a transmission controlling unit, and a generating unit. The transmitting unit transmits transmit data over a transmission channel having a plurality of lines, such that the transmit data are assigned to the plurality of lines by information unit of the transmit data, the information unit. The transmission controlling unit appends control data to transfer data to be transferred to a receiving side to compose the transmit data, the control data being for controlling transmission and reception of the transfer data. The generating unit obtains information about the number of the lines. The generating unit determines, based on the number of the lines and the number of information units of the control data, the number of information units of the transfer data that makes the number of information units of the transmit data integral multiple of the number of the lines.
摘要:
According to an aspect of the invention, a receiving apparatus includes a receiving unit, a reverse conversion unit, and an extracting unit. The receiving unit receives conversion data which is generated, based on a predetermined first rule, by converting transmission data including a plurality of bits and data including an error detection code for detecting an error of the transmission data. The reverse conversion unit reverse-converts, based on a predetermined second rule, the conversion data received by the receiving unit and reverse data generated by reversing a part of bits of the received conversion data to generate a plurality of reverse conversion data. The extracting unit extracts, from the plurality of the reverse conversion data, the reverse conversion data for which an error is not detected in an error detection based on the error detection code.
摘要:
A data transfer apparatus includes a transmitting unit, a transmission controlling unit, and a generating unit. The transmitting unit transmits transmit data over a transmission channel having a plurality of lines, such that the transmit data are assigned to the plurality of lines by information unit of the transmit data, the information unit. The transmission controlling unit appends control data to transfer data to be transferred to a receiving side to compose the transmit data, the control data being for controlling transmission and reception of the transfer data. The generating unit obtains information about the number of the lines. The generating unit determines, based on the number of the lines and the number of information units of the control data, the number of information units of the transfer data that makes the number of information units of the transmit data integral multiple of the number of the lines.
摘要:
An image transfer apparatus includes a generator, a scrambling device, first and second converters, a descrambling device, a detector, and a retransmission request unit. The generator generates packets each having an error detecting code added to image data. The scrambling device scrambles the generated packets on a packet-to-packet basis to reduce repetition of identical data. The first converter subjects the scrambled packets to parallel-to-serial conversion, and transfers the packets to a target apparatus. The second converter receives the scrambled packets from the target apparatus, and subjects the received packets to serial-to-parallel conversion. The descrambling device descrambles the packets subjected to the serial-to-parallel conversion. The detector detects an error from the error detecting code of each of the descrambled packets. Upon detection of the error, the retransmission request unit requests the target apparatus to retransmit the packet in which the error is detected.
摘要:
A disk drive which includes a head amplifier having a function of degaussing a magnetic head effective to suppression of an EAW phenomenon is disclosed. The head amplifier includes a degaussing controller which performs switching from write operation to degaussing operation, a write driver which outputs degaussing current necessary for the degaussing operation, and a current control unit which sets a current waveform of the degaussing current.