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 .................................................. 8
Data Protection ............................................................ 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 ........................................................ 10
Power Monitor ........................................................... 10
Interrupts ................................................................... 10
Flags Register ........................................................... 11
RTC External Components ....................................... 12
PCB Design Considerations for RTC ............................ 13
Layout requirements .................................................. 13
Maximum Ratings ........................................................... 18
Operating Range ............................................................. 18
DC Electrical Characteristics ........................................ 18
Data Retention and Endurance ..................................... 19
Capacitance .................................................................... 19
Thermal Resistance ........................................................ 19
AC Test Loads ................................................................ 20
AC Test Conditions ........................................................ 20
RTC Characteristics ....................................................... 20
AC Switching Characteristics ....................................... 21
SRAM Read Cycle .................................................... 21
SRAM Write Cycle ..................................................... 21
Switching Waveforms .................................................... 22
AutoStore/Power-Up RECALL ....................................... 25
Switching Waveforms .................................................... 25
Software Controlled STORE/RECALL Cycle ................ 26
Switching Waveforms .................................................... 26
Hardware STORE Cycle ................................................. 27
Switching Waveforms .................................................... 27
Truth Table for SRAM Operations ................................. 28
Truth Table for SRAM Operations ................................. 28
HSB must remain HIGH for SRAM operations. ............ 28
Ordering Information ...................................................... 29
Package Diagrams .......................................................... 30
Acronyms ........................................................................ 33
Document Conventions ................................................. 33
Units of Measure ....................................................... 33
Document History Page ................................................. 34
Sales, Solutions, and Legal Information ...................... 37
Worldwide Sales and Design Support ....................... 37
Products .................................................................... 37
PSoC® Solutions ...................................................... 37
Cypress Developer Community ................................. 37
Technical Support ..................................................... 37
Document Number: 001-42880 Rev. *O
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