AN663 - Silicon Laboratories

AN663 MCU

AN663 P RECISION 32™ M CU F A M I L Y C LOCKING O PTIONS 1. Introduction The 32-bit Precision32™ MCU family features a highly configurable clock structure. The advanced highperformance bus (AHB) and advanced peripheral bus (APB) have many options available for clocking. In addition, firmware can disable most peripheral clocks to save power. The clock to the .

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a highly configurable clock structure. The advanced highperformance bus (AHB) and advanced peripheral bus (APB) have many options available for clocking. In addition, firmware can disable most peripheral clocks to save power. The clock to the module must be enabled before firmware can modify the registers. The first initialization step in all peripheral initialization routines should enable the clock to the module. The corresponding Precision32 family reference manual contains detailed descriptive and usage information on each of the clock sources mentioned in this document. 2. Clock Sources .