spread spectrum clocking_xilinx pre-production_Free running(7)

According to embodiments, the controller further includes an adaptive spread-spectrum clocking (“SSC”) circuit 320. The adaptive SSC circuit 320 may provide an operational clock signal to one or more other components of the controller 310 or HDD device 300. For example, the adaptive SSC circuit 320 may provide an operation clock signal to DRAM memory 318 of the controller 310. The adaptive SSC circuit 320 may be implemented in hardware, software, or a combination of the two. In some embodiments, the operation and/or parameters of the adaptive SSC circuit 320 may be configured and controlled by the processor 312.

In further embodiments, the environment may include an adaptive SSC module 330. The adaptive SSC module 330 may perform the methods and processes described herein for performing adaptive spread-spectrum clocking to limit interference in a target band. According to some embodiments, the adaptive SSC module 330 may be implemented in the adaptive SSC circuit and/or the controller 310 as hardware, software, or any combination of the two. For example, the adaptive SSC module 330 may be stored in the memory 318 as part of the firmware of the HDD device 300 and may be executed by the processor 312 for performing the methods and processes described herein. The adaptive SSC module 330 may alternatively or additionally be stored in other computer-readable media accessible by the controller 310.

It will be appreciated that the structure and/or functionality of the HDD device 300 may be different than that illustrated in FIG。 3 and described herein。 For example, the processor 312, read/write channel 316, memory 318, adaptive SSC circuit 320 and other components and circuitry of the HDD device 300 may be integrated within a common integrated circuit package or distributed among multiple integrated circuit packages。 Similarly, the illustrated connection pathways are provided for purposes of illustration and not of limitation, and some components and/or interconnections may be omitted for purposes of clarity。

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