CY14B104M-ZSP25XI datasheet(2/33 Pages) CYPRESS

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CY14B104M-ZSP25XI Datasheet(PDF) 2 Page - Cypress Semiconductor

Part #	CY14B104M-ZSP25XI

Description	4-Mbit (512 K 횞 8/256 K 횞 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 / 33 page

CY14B104K, CY14B104M

Document #: 001-07103 Rev. *S

Page 2 of 33

Contents

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

SRAM Read Cycle .................................................... 19

SRAM Write Cycle ..................................................... 19

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

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

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

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

Hardware STORE Cycle ................................................. 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 ........................................................................ 28

Document Conventions ............................................. 28

Units of Measure ....................................................... 28

Document History Page ................................................. 29

Sales, Solutions, and Legal Information ...................... 33

Worldwide Sales and Design Support ....................... 33

Products .................................................................... 33

PSoC Solutions ......................................................... 33

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