STK12C68

Document Number: 001-51027 Rev. *C

Page 2 of 24

Contents

Pin Configurations ........................................................... 3

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

Device Operation .............................................................. 4

SRAM Read ....................................................................... 4

SRAM Write ....................................................................... 4

AutoStore Operation ........................................................ 4

AutoStore Inhibit Mode .................................................... 5

Hardware STORE (HSB) Operation................................. 5

Hardware RECALL (Power Up) ........................................ 5

Software STORE ............................................................... 5

Software RECALL............................................................. 6

Data Protection ................................................................. 6

Noise Considerations....................................................... 6

Hardware Protect.............................................................. 6

Low Average Active Power .............................................. 6

Preventing Store............................................................... 6

Best Practices................................................................... 7

Maximum Ratings ............................................................. 8

Operating Range ............................................................... 8

DC Electrical Characteristics .......................................... 8

Data Retention and Endurance ....................................... 9

Capacitance ...................................................................... 9

Thermal Resistance.......................................................... 9

AC Test Conditions .......................................................... 9

AC Switching Characteristics ....................................... 10

SRAM Read Cycle .................................................... 10

SRAM Write Cycle ..................................................... 12

AutoStore or Power Up RECALL .................................. 14

Software Controlled STORE/RECALL Cycle................ 15

Hardware STORE Cycle ................................................. 16

Switching Waveform ...................................................... 16

Part Numbering Nomenclature ...................................... 17

Ordering Information ...................................................... 17

Package Diagrams .......................................................... 18

Document History Page ................................................. 23

Sales, Solutions, and Legal Information ...................... 24

Worldwide Sales and Design Support ....................... 24

Products .................................................................... 24

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