US 2013/0170567 A1Published application

Receiving apparatus, transmission and reception system, and restoration method

AssigneeFujitsu Limited

InventorHaruka HIRAI

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Abstract

A receiving apparatus, based on received data and previous selection signals corresponding to the received data, selects transfer data from among the received data. A restoration timing is assumed to change from timing D to timing C, whereby the receiving apparatus, when the transition direction of the restoration timing is a reverse direction to the angle advancement direction and a time period of the restoration timing change exceeds a generation cycle of plural timings, produces all valid information of the transfer data as true values. In addition to data at the restoration timings, data that are received after the restoration timing when the generation cycle is judged to be exceeded and that are received at timings that, according to the order of generation, do not exceed the generation cycle, are also restored.

Claims7

Dependent claims

A receiving apparatus connected to a transmission apparatus that transmits data, comprising:

a clock generating unit that generates a clock signal at a predetermined frequency;
a clock angle-advancing unit that generates a plurality of angle-advanced clock signals including the clock signal generated by the clock generating unit and a plurality of clock signals corresponding to a plurality of timings and generated by angle-advancing the clock signal by predetermined phases;
a receiving unit that uses the angle-advanced clock signals to receive at the timings, the data transmitted by the transmitting apparatus;
a detecting unit that detects each rising edge of each of the received data received by the receiving unit, and each falling edge of each of the received data received by the receiving unit;
a determining unit that based on the detected rising edge of each of the received data and the detected falling edge of the received data, produces a plurality of selection signals that each determine, among the timings, a restoration timing to restore the data, and a plurality of previous selection signals retaining the selection signals;
a judging unit that judges a transition direction of the restoration timing among the timings, based on the selection signals and the previous selection signals;
a selecting unit that selects transfer data from among the received data, based on the received data and the previous selection signals corresponding to the received data;
and
a valid information producing unit that produces valid information of the transfer data selected by the selecting unit, based on the selection signals, the previous selection signals, and the transition direction judged by the judging unit.

6 more elements

A transmission and reception system comprising a transmitting apparatus that transmits data, and a receiving apparatus that is connected to the transmitting apparatus, wherein

the transmitting apparatus includes:
a first clock generating unit that generates a first clock signal at a first predetermined frequency;
and
a transmitting unit that transmits the data based on the first clock signal generated by the first clock generating unit, wherein
the receiving apparatus includes:
a second clock generating unit that generates a second clock signal at a second predetermined frequency;
a second clock angle-advancing unit that generates a plurality of second angle-advancement clock signals including the second clock signal generated by the second clock generating unit and a plurality of clock signals corresponding to a plurality of timings and generated by angle-advancing the second clock signal by predetermined phases;
a receiving unit that uses the second angle-advancement clock signals to receive the data at the timings;
a detecting unit that detects each rising edge of each of the received data received by the receiving unit, and each falling edge of each of the received data received by the receiving unit;
a determining unit that based on the detected rising edge of each of the received data and the detected falling edge of the received data, produces a plurality of selection signals that each determine, among the timings, a restoration timing to restore the data, and a plurality of previous selection signals retaining the selection signals;
a judging unit that judges a transition direction of the restoration timing among the timings, based on the selection signals and the previous selection signals;
a selecting unit that selects transfer data from the received data, based on the received data and the previous selection signals corresponding to the received data;
and
a valid information producing unit that produces valid information of the transfer data selected by the selecting unit, based on the selection signals, the previous selection signals, and the transition direction judged by the judging unit.

11 more elements

A control method executed by a transmission and reception system comprising a transmitting apparatus that transmits data, and a receiving apparatus that is connected to the transmitting apparatus, the control method comprising:

generating, by a first clock generating unit constituting the transmitting apparatus, a first clock signal at a first predetermined frequency;
transmitting, by a transmitting unit constituting the transmitting apparatus, the data based on the first clock signal generated by the first clock generating unit;
generating, by a second clock generating unit constituting the receiving apparatus, a second clock signal at a second predetermined frequency;
generating, by a second clock angle-advancing unit constituting the receiving apparatus, a plurality of second angle-advancement clock signals including the second clock signal generated by the second clock generating unit and a plurality of clock signals corresponding to a plurality of timings and generated by angle-advancing the second clock signal by predetermined phases;
receiving, by a receiving unit constituting the receiving apparatus, the data at the timings by using the second angle-advancement clock signals;
detecting, by a detecting unit constituting the receiving apparatus, each rising edge of each the received data received by the receiving unit and each falling edge of each of the received data received by the receiving unit;
producing, by a determining unit constituting the receiving apparatus and based on the detected rising edge of each of the received data and the detected falling edge of the received data, a plurality of selection signals that each determine, among the timings, a restoration timing to restore the data, and a plurality of previous selection signals retaining the selection signals;
judging, by a judging unit constituting the receiving apparatus, a transition direction of the restoration timing among the timings, based on the selection signals and the previous selection signals;
selecting, by a selecting unit constituting the receiving apparatus, the transfer data from the received data based on the received data and the previous selection signals corresponding to the received data;
and
producing, by a valid information producing unit constituting the receiving apparatus, valid information of the transfer data selected by the selecting unit, based on the selection signals, the previous selection signals, and the transition direction judged by the judging unit.

8 more elements

Dependencies are inferred from the claim text.