US 5,311,510 A · Data storing system for a communication control circuit

Abstract

The data storing system according to the present invention is used for a communication control circuit. The communication control circuit is equipped with a communication sequencer, which takes in a message to be transmitted to a multiplex bus, an ID table which registers data IDs of messages necessary for the station, and the first and second memory circuits which have memory areas keyed to the data IDs. When the communication sequencer takes in a message, it determines whether its data ID exists in the ID table. If the data ID exists and the frequency of occurrence is high, then data following the data ID is temporarily stored in a memory area keyed to a data ID of the first memory circuit. If the data ID exists and the frequency of occurrence is low, then the data following the data ID is temporarily stored in a memory area of the second memory circuit. When a CPU reads the aforementioned stored data, it sets the status area of the storage area, in which the data was stored, for a state that enables a data storage change.

Claims18

Dependent claims

A data storing system for a communication control circuit which is connected to a multiplex transmission line and which, when a message transmitted through said multiplex transmission line is taken in, stores the data contained in said message, the communication control circuit comprising;

registering means for registering a data identifier of a necessary message among messages transmitted through said multiplex transmission line;
storing means which includes a first storage area for storing data, which corresponds to a particular data identifier among said necessary messages, keying the data to said data identifier, and a second storage area for sequentially storing data which corresponds to a plurality of data identifiers other than said particular data identifier;
and
communication control means for determining, when a message is taken in, whether its data identifier exists in said registering means and, if it is determined that the identifier is present, for causing the data corresponding to said data identifier to be stored in one of said first and second storage areas of said storing means.

1 more element

A data storing system for a communication control circuit which is connected to a multiplex transmission line for storing data of messages to be transmitted to the multiplex transmission line and for then transmitting the messages, the communication control circuit comprising:

registering means for registering a particular data identifier among messages to be transmitted to the multiplex transmission line;
storing means including a first storage area for storing data corresponding to the particular data identifier, among the messages to be transmitted, in a manner related to the particular data identifier, and a second storage area for sequentially storing data corresponding to a plurality of data identifiers other than the particular data identifier;
and
communication control means for, when transmitting a message to the multiplex transmission line, storing data of the corresponding data identifier in one of said first and storage second areas of said storing means.

1 more element

Dependencies are inferred from the claim text.

Data storing system for a communication control circuit

Life of this patent

Data storing system for a communication control circuit

Life of this patent

Abstract

Claims18