15.6.2.3 Generic Clock Generator

Each Generator (GCLK_GEN) can be set to run from one of eight different clock sources except GCLKGEN[1], which can be set to run from one of seven sources. GCLKGEN[1] is the only Generator that can be selected as source to other Generators but can not act as source to itself.

Each generator GCLKGEN[x] can be connected to one specific pin GCLK_IO[x]. The GCLK_IO[x] can be set to act as source to GCLKGEN[x] or GCLK_IO[x] can be set up to output the clock generated by GCLKGEN[x].

The selected source can be divided. Each Generator can be enabled or disabled independently.

Each GCLKGEN clock signal can then be used as clock source for Generic Clock Multiplexers. Each Generator output is allocated to one or several Peripherals.

GCLKGEN[0], is used as GCLK_MAIN for the synchronous clock controller inside the Power Manager.

Refer to PM-Power Manager for details on the synchronous clock generation.