Cypress CY14B256K manual Part Numbering Nomenclature CY 14 B 256 K SP 25 X C T

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CY14B256K

Part Numbering Nomenclature

CY 14 B 256 K - SP 25 X C T

Option:

T-Tape and Reel

Blank - Std.

Temperature:

C - Commercial (0 to 70°C)

I - Industrial (–40 to 85°C)

Pb-Free

Speed:

25 - 25 ns

35 - 35 ns

Package:

45 - 45 ns

SP - 48-SSOP

Data Bus:

K - x8 + RTC

Density:

256 - 256 Kb

Voltage:

B - 3.0V

nvSRAM

14 - AutoStore + Software Store + Hardware Store

Cypress

Document Number: 001-06431 Rev. *H

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Contents Cypress Semiconductor Corporation 198 Champion Court FeaturesLogic Block Diagram Functional DescriptionPin Definitions Pin ConfigurationsHardware Store HSB Operation Device OperationAutoStore Operation Data Protection Hardware Recall Power UpSoftware Store Software RecallCurrent versus Cycle Time Low Average Active Power Best PracticesMode Selection A13-A0 Power Real Time Clock Operation Calibrating the Clock AlarmWatchdog Timer Flags Register Power MonitorInterrupts Interrupt RegisterInterrupt Block Diagram WDF Oscf RTC Register Map5 BCD Format Data Function/RangeTime Keeping Minutes 0x7FFA Register Map Detail Time Keeping Years 0x7FFF 10s YearsTime Keeping Months 0x7FFE 10s Month Date Time Keeping Hours 0x7FFBInterrupt Status/Control 0x7FF6 Alarm Day 0x7FF5Register Map Detail Calibration/Control 0X7FF8 0x7FF7When the Flags register is read or on power-up Register Map Detail Alarm Hours 0x7FF4 10s Alarm HoursTo ignore the hours value Alarm Minutes 0x7FF3 Alarm Seconds 0x7FF2Range DC Electrical CharacteristicsMaximum Ratings Operating RangeAC Test Conditions Data Retention and EnduranceCapacitance Thermal ResistanceParameter Sram Read Cycle AC Switching CharacteristicsDescription 25 ns 35 ns 45 ns Min Max Unit Sram Write Cycle Parameter Cypress AltParameter Description CY14B256K Unit Min Max AutoStore or Power Up RecallParameter Alt Description 25 ns 35 ns 45 ns Unit Min Max Software Controlled STORE/RECALL Cycles 20Hardware Store Cycle Soft Sequence CommandsTruth Table For Sram Operations RTC CharacteristicsInputs and Outputs Mode Power Part Numbering Nomenclature CY 14 B 256 K SP 25 X C T Ordering Information Pin Shrunk Small Outline Package Package DiagramsOrig. of Change Submission Description of Change Date Document HistoryAdded default values to RTC Register Map table Updated Features sectionUpdated Reading the clock, Backup Power, Stopping Starting the Oscillator and Alarm descriptions under RTCUSB Sales, Solutions, and Legal InformationWorldwide Sales and Design Support Products PSoC Solutions