Electronic apparatus and data sending/receiving method thereof

A data sending/receiving method usable with an electronic apparatus which allows data to be sent and received between a master unit and a slave unit through a peripheral component interconnect (PCI) bus, the data sending/receiving method comprising:

• sending, by the master unit, address information of request data to the slave unit through a plurality of pins of a data interface;
• sending, by the master unit, size information to the slave unit through additional pins of the data interface;
• and
• processing, by the slave unit, data of an address corresponding to the received address information according to a size corresponding to the size information.

An electronic system, comprising:

• a peripheral component interconnect (PCI) bus;
• a plurality of peripheral devices coupled to the PCI bus to communicate with each other, each of the plurality of peripheral devices comprises:
• a master unit and a slave unit, each having a data interface having a first set of pins through which request data is sent to and received from one or more peripheral devices and a second set of pins through which size information of the request data is sent to and received from one or more peripheral devices,
• wherein a respective slave unit processes data of an address corresponding to address information and size information provided by a respective master unit corresponding to the size information.

A slave device usable with an electronic apparatus, the slave device comprising:

• an internal data bus to transmit information therein;
• a data interface to send and receive data to and from a master device;
• and
• a plurality of internal electronic units to receive address information and size information of requested data from the master device and processes the requested data of an address corresponding to the received address information according to a size corresponding to the received size information, each of the plurality of internal electronic units to receive the address information and the size information from the master device through the data interface and the internal data bus.