CY14B101MA-SP25XI(2011) View Datasheet(PDF) - Cypress Semiconductor

Part Name

Description

MFG CO.

CY14B101MA-SP25XI
(Rev.:2011)

1-Mbit (128 K × 8/64 K × 16) nvSRAM with Real Time Clock

Cypress Semiconductor 

CY14B101KA

CY14B101MA

Contents

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

Pin Definitions .................................................................. 4

Device Operation .............................................................. 5

SRAM Read ....................................................................... 5

SRAM Write ....................................................................... 5

AutoStore Operation ........................................................ 5

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

Hardware RECALL (Power-Up) ....................................... 6

Software STORE ............................................................... 6

Software RECALL ............................................................. 6

Preventing AutoStore ....................................................... 7

Data Protection ................................................................. 8

Noise Considerations ....................................................... 8

Real Time Clock Operation .............................................. 8

nvTIME Operation ....................................................... 8

Clock Operations ......................................................... 8

Reading the Clock ....................................................... 8

Setting the Clock ......................................................... 8

Backup Power ............................................................. 8

Stopping and Starting the Oscillator ............................ 9

Calibrating the Clock ................................................... 9

Alarm ........................................................................... 9

Watchdog Timer .......................................................... 9

Power Monitor ........................................................... 10

Interrupts ................................................................... 10

Flags Register ........................................................... 11

Best Practices ................................................................. 16

Maximum Ratings ........................................................... 17

Operating Range ............................................................. 17

DC Electrical Characteristics ........................................ 17

Data Retention and Endurance ..................................... 18

Capacitance .................................................................... 18

Thermal Resistance ........................................................ 18

AC Test Loads ................................................................ 18

AC Test Conditions ........................................................ 18

RTC Characteristics ....................................................... 19

AC Switching Characteristics ....................................... 20

SRAM Read Cycle .................................................... 20

SRAM Write Cycle ..................................................... 20

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

AutoStore/Power-Up RECALL ....................................... 23

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

Software Controlled STORE/RECALL Cycle ................ 24

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

Hardware STORE Cycle ................................................. 25

Switching Waveforms .................................................... 25

Truth Table For SRAM Operations ................................ 26

Ordering Information ...................................................... 27

Package Diagrams .......................................................... 28

Acronyms ........................................................................ 30

Document Conventions ............................................. 30

Units of Measure ....................................................... 30

Document History Page ................................................. 31

Sales, Solutions, and Legal Information ...................... 34

Worldwide Sales and Design Support ....................... 34

Products .................................................................... 34

PSoC Solutions ......................................................... 34

Document #: 001-42880 Rev. *I

Page 2 of 34

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