CY14B101I(2012) Ver la hoja de datos (PDF) - Cypress Semiconductor

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CY14B101I
(Rev.:2012)

1-Mbit (128 K × 8) Serial (I2C) nvSRAM with Real Time Clock

Cypress Semiconductor 

PRELIMINARY

CY14C101I

CY14B101I

CY14E101I

Contents

Pinout ................................................................................ 3

Pin Definitions .................................................................. 3

I2C Interface ...................................................................... 4

Protocol Overview ............................................................ 4

I2C Protocol – Data Transfer ....................................... 4

Data Validity ................................................................ 5

START Condition (S) ................................................... 5

STOP Condition (P) ..................................................... 5

Repeated START (Sr) ................................................. 5

Byte Format ................................................................. 5

Acknowledge / No-acknowledge ................................. 5

High-Speed Mode (Hs-mode) ..................................... 6

Slave Device Address ................................................. 7

Write Protection (WP) .................................................. 9

AutoStore Operation .................................................... 9

Hardware STORE and HSB pin Operation ................. 9

Hardware RECALL (Power Up) ................................. 10

Write Operation ......................................................... 10

Read Operation ......................................................... 10

Memory Slave Access ............................................... 10

RTC Registers Slave Access .................................... 14

Control Registers Slave ............................................. 16

Serial Number ................................................................. 18

Serial Number Write .................................................. 18

Serial Number Lock ................................................... 18

Serial Number Read .................................................. 18

Device ID ......................................................................... 19

Executing Commands Using Command Register ..... 19

Real Time Clock Operation ............................................ 20

nvTIME Operation ..................................................... 20

Clock Operations ....................................................... 20

Reading the Clock ..................................................... 20

Setting the Clock ....................................................... 20

Backup Power ........................................................... 20

Stopping and Starting the Oscillator .......................... 20

Calibrating the Clock ................................................. 21

Alarm ......................................................................... 21

Watchdog Timer ........................................................ 21

Programmable Square Wave Generator ................... 22

Power Monitor ........................................................... 22

Backup Power Monitor .............................................. 22

Interrupts ................................................................... 22

Interrupt Register ....................................................... 22

Flags Register ........................................................... 23

Maximum Ratings ........................................................... 29

Operating Range ............................................................. 29

DC Electrical Characteristics ........................................ 29

Data Retention and Endurance ..................................... 30

Thermal Resistance ........................................................ 30

AC Test Loads and Waveforms ..................................... 31

AC Test Conditions ........................................................ 31

RTC Characteristics ....................................................... 31

AC Switching Characteristics ....................................... 32

Switching Waveforms .................................................... 32

nvSRAM Specifications ................................................. 33

Switching Waveforms .................................................... 33

Software Controlled STORE/RECALL Cycles .............. 34

Switching Waveforms .................................................... 34

Hardware STORE Cycle ................................................. 35

Switching Waveforms .................................................... 35

Ordering Information ...................................................... 36

Ordering Code Definitions ......................................... 36

Package Diagram ............................................................ 37

Acronyms ........................................................................ 38

Document Conventions ................................................. 38

Units of Measure ....................................................... 38

Document History Page ................................................. 39

Sales, Solutions, and Legal Information ...................... 41

Worldwide Sales and Design Support ....................... 41

Products .................................................................... 41

PSoC Solutions ......................................................... 41

Document Number: 001-54391 Rev. *G

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