Specifications

CY14B108K, CY14B108M
Document #: 001-47378 Rev. *D Page 2 of 31
Contents
Features .............................................................................. 1
Functional Description ...................................................... 1
Logic Block Diagram[1, 2, 3] ............................................ 1
Contents ............................................................................. 2
Pinouts ............................................................................... 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
Best Practices .................................................................... 7
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............................. 8
Calibrating the Clock .................................................... 9
Alarm ............................................................................ 9
Watchdog Timer ........................................................... 9
Power Monitor ............................................................ 10
Interrupts .................................................................... 10
Flags Register ............................................................ 10
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
Switching Waveforms ......................................................19
Switching Waveforms ......................................................20
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
Part Numbering Nomenclature ........................................26
Ordering Information ........................................................27
Package Diagrams ............................................................28
Document History Page ...................................................30
Sales, Solutions, and Legal Information ........................31
Worldwide Sales and Design Support......................... 31
Products .......................................................................31
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