Cypress CY14B256K manual Sales, Solutions, and Legal Information, Usb

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CY14B256K

Sales, Solutions, and Legal Information

Worldwide Sales and Design Support

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Products

 

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PSoC

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General

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Clocks & Buffers

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Low Power/Low Voltage

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Wireless

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Precision Analog

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Memories

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LCD Drive

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Image Sensors

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CAN 2.0b

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USB

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© Cypress Semiconductor Corporation, 2006-2009. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress.

Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Use may be limited by and subject to the applicable Cypress software license agreement.

Document Number: 001-06431 Rev. *H

Revised February 24, 2009

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All products and company names mentioned in this document are the trademarks of their respective holders.

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Contents Features Logic Block DiagramFunctional Description Cypress Semiconductor Corporation 198 Champion CourtPin Configurations Pin DefinitionsAutoStore Operation Device OperationHardware Store HSB Operation Hardware Recall Power Up Software StoreSoftware Recall Data ProtectionLow Average Active Power Best Practices Current versus Cycle TimeMode Selection A13-A0 Power Real Time Clock Operation Watchdog Timer AlarmCalibrating the Clock Power Monitor InterruptsInterrupt Register Flags RegisterInterrupt Block Diagram RTC Register Map5 BCD Format Data Function/Range WDF OscfRegister Map Detail Time Keeping Years 0x7FFF 10s Years Time Keeping Months 0x7FFE 10s MonthDate Time Keeping Hours 0x7FFB Time Keeping Minutes 0x7FFAAlarm Day 0x7FF5 Register Map Detail Calibration/Control 0X7FF80x7FF7 Interrupt Status/Control 0x7FF6Register Map Detail Alarm Hours 0x7FF4 10s Alarm Hours To ignore the hours value Alarm Minutes 0x7FF3Alarm Seconds 0x7FF2 When the Flags register is read or on power-upDC Electrical Characteristics Maximum RatingsOperating Range RangeData Retention and Endurance CapacitanceThermal Resistance AC Test ConditionsAC Switching Characteristics Parameter Sram Read CycleParameter Cypress Alt Description 25 ns 35 ns 45 ns Min Max Unit Sram Write CycleAutoStore or Power Up Recall Parameter Description CY14B256K Unit Min MaxSoftware Controlled STORE/RECALL Cycles 20 Parameter Alt Description 25 ns 35 ns 45 ns Unit Min MaxSoft Sequence Commands Hardware Store CycleInputs and Outputs Mode Power RTC CharacteristicsTruth Table For Sram Operations Part Numbering Nomenclature CY 14 B 256 K SP 25 X C T Ordering Information Package Diagrams Pin Shrunk Small Outline PackageDocument History Orig. of Change Submission Description of Change DateUpdated Features section Updated Reading the clock, Backup Power, StoppingStarting the Oscillator and Alarm descriptions under RTC Added default values to RTC Register Map tableWorldwide Sales and Design Support Products PSoC Solutions Sales, Solutions, and Legal InformationUSB