Method and apparatus for synchronising a functional unit to a predetermined clock frequency

摘要

The method involves generating a local oscillator clock frequency in a function unit. A cycle of local oscillator frequency between preset impulse flanks is counted to provide a count. A clock frequency of a level oscillator is divided by the count to provide a ratio. The ratio is compared with a preset ratio to provide a result and the preset ratio is updated to provide an updated ratio for synchronizing. An independent claim is also included for a circuit arrangement for synchronizing an operation of a function unit.