Specifications

CY14B108K
CY14B108M
Document Number: 001-47378 Rev. *K Page 3 of 36
Contents
Pinouts ..............................................................................4
Pin Definitions .................................................................. 5
Device Operation ..............................................................6
SRAM Read ................................................................6
SRAM Write ................................................................. 6
AutoStore Operation ....................................................6
Hardware STORE (HSB) Operation ............................6
Hardware RECALL (Power-Up) ..................................7
Software STORE .........................................................7
Software RECALL .......................................................7
Preventing AutoStore ..................................................9
Data Protection ............................................................9
Real Time Clock Operation ............................................10
nvTime Operation ......................................................10
Clock Operations .......................................................10
Reading the Clock .....................................................10
Setting the Clock .......................................................10
Backup Power ...........................................................10
Stopping and Starting the Oscillator .......................... 10
Calibrating the Clock .................................................11
Alarm ......................................................................... 11
Watchdog Timer ........................................................ 11
Power Monitor ........................................................... 12
Interrupts ................................................................... 12
Flags Register ........................................................... 12
RTC External Components .......................................13
PCB Design Considerations for RTC ............................14
Layout requirements ..................................................14
Maximum Ratings ........................................................... 19
Operating Range ............................................................. 19
DC Electrical Characteristics ........................................ 19
Data Retention and Endurance .....................................20
Capacitance .................................................................... 20
Thermal Resistance ........................................................ 20
AC Test Loads ................................................................ 21
AC Test Conditions ........................................................ 21
RTC Characteristics ....................................................... 21
AC Switching Characteristics ....................................... 22
Switching Waveforms .................................................... 22
AutoStore/Power-Up RECALL ....................................... 25
Switching Waveforms .................................................... 25
Software Controlled STORE and RECALL Cycle ........ 26
Switching Waveforms .................................................... 26
Hardware STORE Cycle ................................................. 27
Switching Waveforms .................................................... 27
Truth Table For SRAM Operations ................................ 28
Ordering Information ...................................................... 29
Ordering Code Definitions ......................................... 29
Package Diagrams .......................................................... 30
Acronyms ........................................................................ 32
Document Conventions ................................................. 32
Units of Measure ....................................................... 32
Errata ............................................................................... 33
Part Numbers Affected .............................................. 33
8Mb (1024 K × 8, 512 K × 16) nvSRAM
Qualification Status ........................................................... 33
8Mb (1024 K × 8, 512 K × 16) nvSRAM
Errata Summary ............................................................... 33
Document History Page ................................................. 34
Sales, Solutions, and Legal Information ...................... 36
Worldwide Sales and Design Support ....................... 36
Products .................................................................... 36
PSoC® Solutions ...................................................... 36
Cypress Developer Community ................................. 36
Technical Support ..................................................... 36