29.3 Block Diagram
Registers labeled in uppercase are synchronous to CLK_SERCOMx_APB and accessible from the CPU, while those with lowercase labels can be programmed to run on the internal generic clock or an external clock.
Registers labeled in uppercase are synchronous to CLK_SERCOMx_APB and accessible from the CPU, while those with lowercase labels can be programmed to run on the internal generic clock or an external clock.
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