Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus interface architecture
Reexamination Certificate
2005-06-07
2005-06-07
Knight, Anthony (Department: 2121)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus interface architecture
C710S305000, C710S073000, C713S320000, C713S324000, C713S340000, C713S300000, C713S330000, C700S066000
Reexamination Certificate
active
06904488
ABSTRACT:
A portable electronic device according to the invention comprises a USB connector4, a USB controller6for executing predetermined data communication processing attendant on data communication with a personal computer2connected to the USB connector4, and a main CPU7for executing device operation processing for the usual operation of the device, and is adapted to receive a power supply from the personal computer2or an external power source3as connected to the USB connector4. Discriminating between the sources of supply of power, the main CPU7causes the USB controller6to execute the predetermined data communication processing while power is supplied from the personal computer2, or executes the usual device operation processing while power is supplied from the external power source3. This assures more rapid and simplified processing even when the USB connector is used also as a connector for the external power source.
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Matsumoto Katsuyuki
Yoshida Masanao
Armstrong Kratz Quintos Hanson & Brooks, LLP
Sanyo Electric Co,. Ltd.
Sanyo Technosound Co. Ltd.
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