2.4 Clocks

The SERCOM module requiress the following clocks for its operation:

• SERCOM bus clock
• SERCOM CORE generic clock
• SERCOM SLOW generic clock

By default, the SERCOM bus clock (CLK_SERCOMx_APB) is disabled but can be enabled and disabled in the Power Manager (PM) module. Two generic clocks are used by the SERCOM module: GCLK_SERCOMx_CORE and GCLK_SERCOMx_SLOW. The core clock (GCLK_SERCOMx_CORE) is required to clock the SERCOM while operating as a host, while the slow clock (GCLK_SERCOMx_SLOW) is only required for certain functions like I²C timeouts.