US 2003/0165277 A1 · Data processing system,and data processing method

Abstract

According to a data processing apparatus and a data processing method of the present invention, supply of clocks is controlled according to various kinds of processing commands which are issued from a command issuing source and, when a first buffer memory underflows, a data transfer request is made without terminating a data processing command, and data processing is resumed at the completion of a data transfer command. Therefore, supply of clocks can be stopped when data are not transferred and when data are not processed, whereby power consumption can be reduced. Further, when the first buffer memory underflows, it is not necessary for the command issuing source to issue a data processing command again, whereby the number of commands to be issued can be reduced.

Claims28

Dependent claims

A data processing apparatus which performs data transfer for writing transfer data into a first buffer memory according to a command outputted from a command issuing source, processes the transfer data read from the first buffer memory, with a data processing circuit, and writes the processed data into a second buffer memory, said apparatus including:

a clock supply circuit for performing supply of a first clock to a first data write circuit which writes the transfer data into the first buffer memory, and supply of a second clock to a data read circuit which reads the transfer data from the first buffer memory, the data processing circuit, and a second data write circuit which writes the processed data into the second buffer memory.

A data processing apparatus which reads data stored in a first buffer memory according to a command outputted from a command issuing source to perform data processing with a data processing circuit, writes the processed data into a second buffer memory, and reads the processed data that is written in the second buffer memory to perform data transfer, said apparatus including:

a clock supply circuit for performing supply of a first clock to a first data read circuit which reads the data stored in the first buffer memory to the data processing circuit, the data processing circuit, and a data write circuit which writes the processed data into the second buffer memory, and supply of a second clock to a second data read circuit which reads the processed data that is stored in the second buffer memory and transfers the data.

A data processing method of performing data transfer for writing transfer data into a first buffer memory according to a command outputted from a command issuing source, processing the transfer data read from the first buffer memory, with a data processing circuit, and writing the processed data into a second buffer memory, said method including:

performing supply of a first clock to a first data write circuit which writes the transfer data into the first buffer memory, and supply of a second clock to a data read circuit which reads the transfer data from the first buffer memory, the data processing circuit which processes the transfer data, and a data write circuit which writes the processed data into the second buffer memory.

A data processing method of reading data stored in a first buffer memory to perform data processing with a data processing circuit, writing the processed data into a second buffer memory, and reading the processed data that is written in the second buffer memory to perform data transfer, said method including:

performing supply of a first clock to a first data read circuit which reads the data stored in the first buffer memory to the data processing circuit, the data processing circuit which processes the data, and a data write circuit which writes the processed data into the second buffer memory, and supply of a second clock to a second data read circuit which reads the processed data that is stored in the second buffer memory and transfers the data.

Dependencies are inferred from the claim text.

Data processing system,and data processing method

Life of this patent

Data processing system,and data processing method

Life of this patent

Abstract

Claims28