U-500 Using the bq4845 for a Low-Cost RTC/NVSRAM Subsystem

Using the bq4845 for a Low-Cost RTC/NVSRAM Subsystem.The bq4845 combines on one IC a low-power real-time clock (RTC) a microcontroller supervisor and a nonvolatile control circuit for static RAM. The part is the basis of a low-cost reliable RTC plus nonvolatile SRAM subsystem for many embedded applications. This application note discusses the key aspects of bq4845 operation: component sele