Patent ID: 7418538
Filing Date: 2008-08-26
Classification: G06F

Abstract:
1. An electronic instrument, comprising: an upstream port provided on a first side surface of the electronic instrument; a downstream port provided on a second side surface that is a surface of the electronic instrument and opposite to the first side surface; and a data transfer control device that is connected to the upstream port and the downstream port and controls data transfer through the upstream port and data transfer through the downstream port, the data transfer control device including: a device controller that controls data transfer as a device; and a host controller that controls data transfer as a host, when a second electronic instrument has been connected to the downstream port, the host controller controlling data transfer between the electronic instrument and the second electronic instrument through the downstream port, and when the second electronic instrument has been connected to the upstream port, the device controller controlling data transfer between the electronic instrument and the second electronic instrument through the upstream port.