CLOCK GENERATION APPARATUS, SERVER SYSTEM AND CLOCK CONTROL METHOD

摘要

In order to provide a multiplexed clock generation apparatus in which synchronization between circuits based on a received clock is not lost, a clock generation apparatus is made to have a clock determination unit which determines whether a cycle shift time between a first clock signal and a second clock signal satisfies a predetermined condition or not and a clock switching unit which switches the first clock signal and the second clock signal based on determination of the clock determination unit. The clock determination unit determines that clock switching is possible when, as the predetermined condition, a first condition that a cycle shift time is equal to or more than a period from a setup start time to a hold end time of a signal specified for a clock bus and a second condition that the cycle shift time exists before the next setup start time are satisfied together.

主权项

1. A clock generation apparatus, comprising: a clock determination unit which determines whether a cycle shift time between a first clock signal and a second clock signal satisfies a predetermined condition; and
a clock switching unit which switches said first clock signal and said second clock signal based on determination of said clock determination unit.