pub type W = W<Cfg3Spec>;
Register CFG3 writer
CFG3
struct W { /* private fields */ }
Bits 0:2 - CKOUT1 Clock Source Selection
Bits 8:13 - The CK_OUT1 divider which the CK_OUT1 frequency can be reduced see bits 2:0 of RCU_CFG3 for CK_OUT1