CY14B104M-ZSP25XI datasheet(2/35 Pages) CYPRESS

Part #	CY14B104M-ZSP25XI

Description	4-Mbit (512 K x 8/256 K x 16) nvSRAM with Real Time Clock 25 ns and 45 ns access times

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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2 / 35 page

CY14B104K, CY14B104M

Document #: 001-07103 Rev. *U

Page 2 of 35

Contents

Pin Definitions .................................................................. 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 Loads ................................................................ 17

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

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

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

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

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

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

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

Ordering Code Definitions ......................................... 26

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

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

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

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

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

Sales, Solutions, and Legal Information ...................... 35

Worldwide Sales and Design Support ....................... 35

Products .................................................................... 35

PSoC Solutions ......................................................... 35

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

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