AutoStore/Power Up Recall

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 Corporation Pin Configurations Pin Descriptions DC Characteristics RF SSOP-48 Package Thermal CharacteristicsSymbol Parameter Commercial Industrial Units Min Absolute Maximum Ratings AC Test Conditions Capacitance RTC DC Characteristics Ibak Symbols Parameter STK17T88-25 STK17T88-45 Units Alt Min Max Sram Read Cycles #1 and #2 Min 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 Max Software-Controlled STORE/RECALL Cycle CONTROLLED13 Soft Sequence Commands Hardware Store to Sram DisabledSymbols Parameter STK17T88 Units Standard Min Max Hardware Store Cycle Mode Selection A14-A0 Mode Hardware Recall Power UP NvSRAM OperationAutoStore Operation Hardware Store HSB Operation Software Store Noise ConsiderationsPreventing AutoStore Best Practices Real Time Clock Power Monitor AlarmWatchdog Timer Interrupt Register Flags Register RTC Register Map Register BCD Format Data Function / RangeOscen WDS WDW WDT Register Map Detail 0x7FF5 Alarm Day 0x7FF4 Alarm Hours 10s Alarm Hours0x7FF3 Alarm Minutes 0x7FF2 Alarm Seconds User must reset this bit to 0 to clear this condition Ordering Code Description Access Times ns TemperatureOrdering Codes 0x7FF0 Flags Package Diagram Document History Sales, Solutions, and Legal InformationWorldwide Sales and Design Support Products PSoC Solutions