Patent ID: 7549594
Filing Date: 2009-06-23
Classification: G06K

Abstract:
1. An electronic apparatus comprising: a controller including an interface part which communicates with an external host apparatus, and a status register group; and a plurality of functional units communicating with the host apparatus via the interface part, respectively, wherein the status register group includes a plurality of operable status registers which correspond to said plurality of functional units, respectively, and which indicate whether a corresponding plurality of functional units are operable in an operable state or not in an inoperable state, and a plurality of processing status registers which correspond to said plurality of functional units, respectively, and which indicate whether the corresponding plurality of functional units are executing processing in a Function-Being-Processed State or not in a Function-Unprocessed State wherein said controller transfers a command to a functional unit when said controller receives the command from the host apparatus and the command is a command for any one of said plurality of functional units, and transmits a status of the status register group to the host apparatus as a response to the read command when the command is a read command for the status register group, wherein the interface part performs a master-slave system type data communication with the host apparatus, in which the host apparatus serves as a master, and the electronic apparatus serves as a slave, and wherein the functional unit starts activating upon receiving an activation command from the host apparatus; the operable status register corresponding to the functional unit turns from the inoperable state to the operable state when the functional unit turns into the operable state; and the functional unit stops operation thereof and turns into the inoperable state, and the operable status register corresponding to the functional unit turns from the operable state to the inoperable state upon receiving a stop command for the functional unit from the host apparatus.