A multiphase clock generating circuit includes a multiphase clock
generator that produces a plurality of multiphase output signals at a
first frequency and a multiphase divider with delayed reset control. The
multiphase divider with delayed reset control is operatively coupled to
receive the plurality of multiphase output signals at the first frequency
and further operative to produce a plurality of multiphase output signals
at a second frequency based on reset control information. As a result, an
interface can be supplied with and switch between multiphase clock at
different frequencies within a short amount of time with reduced power
consumption and circuit area.