CY14B108K_1106 Datasheet, PDF (3/33 Pages) Cypress Semiconductor – 8-Mbit (1024 K x 8/512 K x 16) nvSRAM with Real Time Clock

CY14B108K, CY14B108M
Contents
Pinouts .............................................................................. 4
Pin Definitions .................................................................. 5
Device Operation .............................................................. 6
SRAM Read ....................................................................... 6
SRAM Write ....................................................................... 6
AutoStore Operation ........................................................ 6
Hardware STORE (HSB) Operation ................................. 7
Hardware RECALL (Power-Up) ....................................... 7
Software STORE ............................................................... 7
Software RECALL ............................................................. 7
Preventing AutoStore ....................................................... 8
Data Protection ................................................................. 9
Noise Considerations ....................................................... 9
Real Time Clock Operation .............................................. 9
nvTime Operation ........................................................ 9
Clock Operations ......................................................... 9
Reading the Clock ....................................................... 9
Setting the Clock ......................................................... 9
Backup Power ............................................................. 9
Stopping and Starting the Oscillator .......................... 10
Calibrating the Clock ................................................. 10
Alarm ......................................................................... 10
Watchdog Timer ........................................................ 10
Power Monitor ........................................................... 11
Interrupts ................................................................... 11
Flags Register ........................................................... 12
Best Practices ................................................................. 17
Maximum Ratings ........................................................... 18
Operating Range ............................................................. 18
DC Electrical Characteristics ........................................ 18
Data Retention and Endurance ..................................... 19
Capacitance .................................................................... 19
Thermal Resistance ........................................................ 19
AC Test Loads ................................................................ 19
AC Test Conditions ........................................................ 19
RTC Characteristics ....................................................... 20
AC Switching Characteristics ....................................... 21
Switching Waveforms .................................................... 21
AutoStore/Power-Up RECALL ....................................... 24
Switching Waveforms .................................................... 24
Software Controlled STORE and RECALL Cycle ........ 25
Switching Waveforms .................................................... 25
Hardware STORE Cycle ................................................. 26
Switching Waveforms .................................................... 26
Truth Table For SRAM Operations ................................ 27
Ordering Information ...................................................... 28
Ordering Code Definitions ......................................... 28
Package Diagrams .......................................................... 29
Acronyms ........................................................................ 31
Document Conventions ................................................. 31
Units of Measure ....................................................... 31
Document History Page ................................................. 32
Sales, Solutions, and Legal Information ...................... 33
Worldwide Sales and Design Support ....................... 33
Products .................................................................... 33
PSoC Solutions ......................................................... 33
Document #: 001-47378 Rev. *G
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