Communication system and master apparatus
AssigneeToshiba Tec Kabushiki Kaisha
InventorKatsuya Sasahara
Life of this patent
Estimating the term…
Abstract
In a slave station, the reception terminal and the transmission terminal can be connected to the reception terminal and the transmission terminal of the extension connector of a master station. Two-byte data is transmitted and received between the master station and the slave station as one packet. The master station specifies a device ID, an address, and read/write in a first byte and stores the data in a second byte to transmit the data. The slave station performs a read process or a write process when the slave station determines that the device ID set in the first byte of reception data is identical to the device ID of the slave station.
Claims7
A communication system comprising:
- a master apparatus having;
- a plurality of extension connectors, each extension connector having a transmission terminal and a reception terminal,
- a serial port having transmission lines and reception lines,
- transmission units which are connected between the transmission line and the transmission terminal of said each extension connector, respectively and
- reception units which are connected between the reception line and the reception terminal of said each extension connector respectively, said each reception unit being wired-connected to the reception line;
- and
- a slave apparatus whose reception terminal and transmission terminal can be connected to the transmission terminal and the reception terminal of the extension connector of the master apparatus respectively,
- wherein the master apparatus has a first communication control unit configured to transmit two-byte data, in which a device ID, an address, specification of read/write are stored in a first byte and data is stored in a second byte, in one-packet form, and
- the slave apparatus has a second communication unit configured to perform a read process or a write process when the slave apparatus determines that the device ID set in the first byte of reception data is identical to the device ID of the slave apparatus.
A master apparatus comprising:
- a plurality of extension connectors, each extension connector having a transmission terminal and a reception terminal;
- a serial port having transmission lines and reception lines;
- transmission units which are connected between the transmission line and the transmission terminal of said each extension connector respectively;
- reception units which are connected between the reception line and the reception terminal of said each extension connector respectively, said each reception unit being wired-connected to the reception line;
- a transmission control unit configured to transmit two-byte data, in which a device ID, an address, specification of read/write are stored in a first byte and data is stored in a second byte, in one-packet form through said each transmission units;
- and
- a reception control unit configured to receive the two-byte data through said each reception unit.
Dependencies are inferred from the claim text.