Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorAkihiro Shimura
Estimating the term…
An interface apparatus capable of appropriate connection with external devices having various specifications. Control signal DRVSEL is used for setting output method of a signal from output circuit 801 to an open-collector drive or a totem-pole drive. 3-State buffer 904 which drives a communication path comes into high-impedance status when its enable input is at a H level, on the other hand, when the enable input is at a L level, drives its output with the same logic as that of AND gate output. When the signal DRVSEL is at the L level, the 3-state buffer 904 drives the output only when its internal signal is at the L level, thus output is made in the open-collector drive. On the other hand, when the signal DRVSEL is at the H level, the 3-state buffer 904 drives the output with the same logic as that of its internal signal, thus output is made in the totem-pole drive.
An apparatus for transmitting and receiving information with an external device via a communication interface, comprising:
An apparatus for transmitting and receiving information with an external device via a communication interface, comprising:
A system including a plurality of devices connected with each other via a communication interface,
A method of negotiating for transmitting and receiving information with an external device via a communication interface, comprising:
A method of negotiating for transmitting and receiving information with an external device via a communication interface, comprising:
Dependencies are inferred from the claim text.