Data transfer control device and electronic instrument
First Claim
1. A data transfer control device for performing data transfer through a serial signal line, the data transfer control device comprising:
- an encoder circuit which performs processing of encoding data by using a predetermined encoding method and generation processing of a special code defined by the encoding method;
a parallel/serial conversion circuit which receives parallel data from the encoder circuit and converts the parallel data to serial data; and
a transmitter circuit which receives the serial data from the parallel/serial conversion circuit and transmits the special code and the data through the serial signal line, wherein the transmitter circuit outputs an idle signal, logical level of which is continuously fixed at a first logical level in units of a given number of bits or more to the serial signal line as a signal indicating an idle state, and wherein, when absence of the transmission data due to an idle period has been indicated by a transmission data valid/invalid signal from an upper layer circuit, the encoder circuit suspends operation after the indication of the absence of the transmission data.
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Accused Products
Abstract
A data transfer control device includes: an encoder circuit which performs encoding data and generation of a special code; a parallel/serial conversion circuit which converts parallel data from the encoder circuit to serial data; and a transmitter circuit which receives the serial data and transmits the special code and the data through the serial signal line. The transmitter circuit outputs an idle signal, logical level of which is continuously fixed at a first logical level in units of a given number of bits or more to the serial signal line as a signal indicating an idle state. The encoder circuit suspends operation after an indication that there is no transmission data by a transmission data valid/invalid signal from an upper layer circuit.
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Citations
20 Claims
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1. A data transfer control device for performing data transfer through a serial signal line, the data transfer control device comprising:
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an encoder circuit which performs processing of encoding data by using a predetermined encoding method and generation processing of a special code defined by the encoding method;
a parallel/serial conversion circuit which receives parallel data from the encoder circuit and converts the parallel data to serial data; and
a transmitter circuit which receives the serial data from the parallel/serial conversion circuit and transmits the special code and the data through the serial signal line, wherein the transmitter circuit outputs an idle signal, logical level of which is continuously fixed at a first logical level in units of a given number of bits or more to the serial signal line as a signal indicating an idle state, and wherein, when absence of the transmission data due to an idle period has been indicated by a transmission data valid/invalid signal from an upper layer circuit, the encoder circuit suspends operation after the indication of the absence of the transmission data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 12, 13, 14, 15, 16)
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8. A data transfer control device for performing data transfer through a serial signal line, the data transfer control device comprising:
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a receiver circuit which receives a special code and data through the serial signal line;
a serial/parallel conversion circuit which receives serial data from the receiver circuit and converts the serial data to parallel data;
an idle detection circuit which detects an idle signal, logical level of which is continuously fixed at a first logical level in units of a given number of bits or more; and
a decoder circuit which receives parallel data from the serial/parallel conversion circuit and performs decode processing of the data and the special code which have been encoded by using a predetermined encoding method, wherein the serial/parallel conversion circuit suspends operation after the idle signal has been detected by the idle detection circuit and output of parallel data from the serial/parallel conversion circuit has been completed. - View Dependent Claims (9, 10, 11, 17, 18, 19, 20)
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Specification