CY14B108K-ZS45XI datasheet(2/31 Pages) CYPRESS

Part #	CY14B108K-ZS45XI

Description	8 Mbit (1024 K x 8/512 K x 16) nvSRAM with Real Time Clock

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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2 / 31 page

CY14B108K, CY14B108M

Document #: 001-47378 Rev. *F

Page 2 of 31

Contents

Pinouts .............................................................................. 3

Device Operation .............................................................. 4

SRAM Read ....................................................................... 4

SRAM Write ....................................................................... 4

AutoStore Operation ........................................................ 4

Hardware STORE (HSB) Operation................................. 5

Hardware RECALL (Power-Up) ....................................... 5

Software STORE ............................................................... 5

Software RECALL............................................................. 5

Preventing AutoStore....................................................... 6

Data Protection ................................................................. 7

Noise Considerations....................................................... 7

Real Time Clock Operation.............................................. 7

nvTime Operation........................................................ 7

Clock Operations......................................................... 7

Reading the Clock ....................................................... 7

Setting the Clock ......................................................... 7

Backup Power ............................................................. 7

Stopping and Starting the Oscillator............................ 8

Calibrating the Clock ................................................... 8

Alarm ........................................................................... 8

Watchdog Timer .......................................................... 8

Power Monitor ............................................................. 9

Interrupts ..................................................................... 9

Flags Register ........................................................... 10

Best Practices................................................................. 15

Maximum Ratings........................................................... 16

Operating Range............................................................. 16

DC Electrical Characteristics ........................................ 16

Data Retention and Endurance ..................................... 17

Capacitance .................................................................... 17

Thermal Resistance........................................................ 17

AC Test Conditions ........................................................ 17

RTC Characteristics ....................................................... 18

AC Switching Characteristics ....................................... 19

Switching Waveforms .................................................... 19

Switching Waveforms .................................................... 20

Switching Waveforms .................................................... 21

AutoStore/Power-Up RECALL....................................... 22

Switching Waveforms .................................................... 22

Software Controlled STORE and RECALL Cycle ........ 23

Switching Waveforms .................................................... 23

Hardware STORE Cycle ................................................. 24

Switching Waveforms .................................................... 24

Truth Table For SRAM Operations................................ 25

For x8 Configuration.................................................. 25

For x16 Configuration................................................ 25

Ordering Information...................................................... 26

Ordering Code Definition........................................... 26

Package Diagrams.......................................................... 27

Acronyms........................................................................ 29

Document Conventions ................................................. 29

Units of Measure ....................................................... 29

Document History Page ................................................. 30

Sales, Solutions, and Legal Information ...................... 31

Worldwide Sales and Design Support....................... 31

Products .................................................................... 31

PSoC Solutions ......................................................... 31

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CY14B108K-ZS45XI Datasheet(PDF) 2 Page - Cypress Semiconductor

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