Cypress STK17T88 manual AutoStore/Power Up Recall

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Figure 9. AutoStore Power Up RECALL

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NOTE: Read and Write cycles will be ignored during STORE, RECALL and while VCC is below VSWITCH

Notes

9.tHRECALL starts from the time VCC rises above VSWITCH

10.If an SRAM WRITE has not taken place since the last nonvolatile cycle, no STORE will take place

11.Industrial Grade Devices require 15 ms Max.

Document Number: 001-52040 Rev. *A

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Contents Features Logic Block DiagramDescription Cypress Semiconductor CorporationPin Configurations Pin DescriptionsDC Characteristics RF SSOP-48 Package Thermal CharacteristicsSymbol Parameter Commercial Industrial Units Min Absolute Maximum RatingsAC Test Conditions CapacitanceRTC DC Characteristics IbakSymbols Parameter STK17T88-25 STK17T88-45 Units Alt Min Max Sram Read Cycles #1 and #2Min Max Symbols Parameter STK17T88-25 STK17T88-45 Units Alt MinSram Write Cycles #1 and #2 AutoStore/Power Up Recall Symbols Parameter STK17T88 Units Standard Alternate Min MaxSoftware-Controlled STORE/RECALL Cycle CONTROLLED13Soft Sequence Commands Hardware Store to Sram DisabledSymbols Parameter STK17T88 Units Standard Min Max Hardware Store CycleMode Selection A14-A0 ModeHardware Recall Power UP NvSRAM OperationAutoStore Operation Hardware Store HSB OperationSoftware Store Noise ConsiderationsPreventing AutoStore Best PracticesReal Time Clock Power Monitor AlarmWatchdog Timer Interrupt Register Flags RegisterRTC Register Map Register BCD Format Data Function / RangeOscen WDS WDW WDTRegister Map Detail 0x7FF5 Alarm Day 0x7FF4 Alarm Hours 10s Alarm Hours0x7FF3 Alarm Minutes 0x7FF2 Alarm SecondsUser must reset this bit to 0 to clear this condition Ordering Code Description Access Times ns TemperatureOrdering Codes 0x7FF0 FlagsPackage Diagram Document History Sales, Solutions, and Legal InformationWorldwide Sales and Design Support Products PSoC Solutions