Patent ID: 8488423

Claim:
A servo control device for controlling a driver which drives an optical pickup and a motor, the servo control device comprising: a phase compensator configured to generate a plurality of types of control values for controlling the driver based on a signal output from the optical pickup, and output the plurality of types of control values; and a transfer data generator configured to serially transfer the plurality of types of control values to the driver, wherein: the phase compensator sends, to the transfer data generator, a notification that the phase compensator has output a control value which needs to be sent with a reduced delay among the plurality of types of control values, in response to the notification, the transfer data generator determines whether or not the transfer data generator is transferring any of the plurality of types of control values, and if the transfer data generator is transferring none of the plurality of types of control values, the transfer data generator starts transferring a control value associated with the notification among the plurality of types of control values, whereas if the transfer data generator is transferring one of the plurality of types of control values, the transfer data generator starts transferring a control value associated with the notification among the plurality of types of control values after transferring the one of the plurality of types of control values.