Cypress CY14B256K specs

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

Contents

Cypress Semiconductor Corporation 198 Champion Court FeaturesLogic Block Diagram Functional Description Pin Definitions Pin Configurations Hardware Store HSB Operation Device OperationAutoStore Operation Data Protection Hardware Recall Power UpSoftware Store Software Recall Current versus Cycle Time Low Average Active Power Best Practices Mode Selection A13-A0 Power Real Time Clock Operation Calibrating the Clock AlarmWatchdog Timer Flags Register Power MonitorInterrupts Interrupt Register Interrupt Block Diagram WDF Oscf RTC Register Map5 BCD Format Data Function/Range Time Keeping Minutes 0x7FFA Register Map Detail Time Keeping Years 0x7FFF 10s YearsTime Keeping Months 0x7FFE 10s Month Date Time Keeping Hours 0x7FFB Interrupt Status/Control 0x7FF6 Alarm Day 0x7FF5Register Map Detail Calibration/Control 0X7FF8 0x7FF7 When 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 0x7FF2 Range DC Electrical CharacteristicsMaximum Ratings Operating Range AC Test Conditions Data Retention and EnduranceCapacitance Thermal Resistance Parameter Sram Read Cycle AC Switching Characteristics Description 25 ns 35 ns 45 ns Min Max Unit Sram Write Cycle Parameter Cypress Alt Parameter Description CY14B256K Unit Min Max AutoStore or Power Up Recall Parameter Alt Description 25 ns 35 ns 45 ns Unit Min Max Software Controlled STORE/RECALL Cycles 20 Hardware Store Cycle Soft Sequence Commands Truth 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 Diagrams Orig. of Change Submission Description of Change Date Document History Added default values to RTC Register Map table Updated Features sectionUpdated Reading the clock, Backup Power, Stopping Starting the Oscillator and Alarm descriptions under RTC USB Sales, Solutions, and Legal InformationWorldwide Sales and Design Support Products PSoC Solutions