Patent ID: 7583734
Filing Date: 2009-09-01
Classification: H04L

Abstract:
1. A two-wire type data communication method comprising performing a data communication and supplying clocks and electric power by a first signal line and a second signal line between a controller and a data storage device, wherein, among the first signal line and the second signal line for connecting between the controller and the data storage device, a first clock pulse of a first phase having a constant duty ratio and not being modulated is transmitted by the first signal line and a second clock pulse of a second phase modulated in accordance with a logic of transmit data is transmitted by the second signal line, the second phase is opposite of the first phase, an electric power is supplied to the data storage device by a difference of voltage between the first signal line and the second signal line, and the second clock pulse transmitted by the second signal line is formed depending on the presence or absence of a pulse in accordance with the logic of the transmit data.