Optical disc drive

An optical disc drive connected with a host, a double-sided optical disc is loadable into the optical disc drive, the optical disc drive comprising:

• a spindle motor comprising a turn table for supporting and rotating the optical disc;
• a first control module comprising a first optical pickup head corresponding to a first data layer of the optical disc;
• and
• a second control module comprising a second optical pickup head corresponding to a second data layer of the optical disc;
• wherein the first control module and the second control module communicate with each other according to a negotiation signal, and the spindle motor is operated at a target rotation speed under control of the first control module,
• wherein the second control module instructs the first control module to control the spindle motor to be operated at the target rotation speed according to the negotiation signal.

An optical disc drive connected with a host, a double-sided optical disc is loadable into the optical disc drive, the optical disc drive comprising:

• a first control module comprising a first optical pickup head corresponding to a first data layer of the optical disc;
• a second control module comprising a second optical pickup head corresponding to a second data layer of the optical disc;
• wherein the first control module and the second control module communicate with each other according to a negotiation signal,
• wherein the first control module comprises a first digital signal processor having a first transmitter terminal and a first receiver terminal, and the second control module comprises a second digital signal processor having a second transmitter terminal and a second receiver terminal, wherein the first transmitter terminal is connected with the second receiver terminal, the second transmitter terminal is connected with the first receiver terminal, and a signal from the first transmitter terminal and a signal from the second transmitter terminal are combined as the negotiation signal.