Patent ID: 11942113
Assignee: STMICROELECTRONICS S.R.L.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 17:
18. A method of performing a retract operation for a hard disk drive system, the method comprising:
generating, by a master controller operatively coupled to a first voice coil motor (VCM) of the hard disk drive system, a first pulse signal on a communication bus coupled to a first slave controller operatively coupled to a second VCM of the hard disk drive system;
instructing the first VCM, by the master controller, to perform a first brake operation after generating the first pulse signal;
instructing the second VCM, by the first slave controller in response to the first pulse signal, to perform a second brake operation;
generating a second pulse signal on the communication bus, by the master controller, upon completion of the first brake operation;
generating a third pulse signal on the communication bus, by the first slave controller, upon completion of the second brake operation;
instructing the first VCM, by the master controller to perform a first operation after completing the first brake operation;
generating a fourth pulse signal on the communication bus, by the master controller, upon completion of the first operation;
instructing the second VCM, by the first slave controller, to perform a second operation based on receiving the second pulse signal or the fourth pulse signal; and
generating a fifth pulse signal on the communication bus, by the first slave controller, upon completion of the second operation.