Document Number: 001-50592 Rev. *A Page 2 of 17
Contents
Features................................................................................ 1
Functional Description........................................................ 1
Logic Block Diagram........................................................... 1
Contents............................................................................... 2
Pin Configurations .............................................................. 3
Device Operation................................................................. 4
SRAM Read .......................................................................... 4
SRAM Write.......................................................................... 4
AutoStore Operation ........................................................... 4
AutoStore Inhibit Mode....................................................... 4
Hardware STORE (HSB) Operation.................................... 5
Hardware RECALL (Power Up)........................................... 5
Software STORE.................................................................. 5
Software RECALL................................................................ 6
Preventing STORE............................................................... 6
Hardware Protect................................................................. 6
Noise Considerations.......................................................... 6
Low Average Active Power................................................. 6
Best Practices...................................................................... 7
Maximum Ratings................................................................ 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
Switching Waveforms ....................................................... 10
Switching Waveforms ....................................................... 11
AutoStore or Power Up RECALL ..................................... 12
Switching Waveforms ....................................................... 12
Software Controlled STORE/RECALL Cycle................... 13
Switching Waveforms ....................................................... 13
Hardware STORE Cycle.................................................... 14
Switching Waveforms ........................................................ 14
Part Numbering Nomenclature.......................................... 15
Ordering Information......................................................... 15
Package Diagrams............................................................. 16
Document History Page..................................................... 17
Sales, Solutions and Legal Information .......................... 17
Worldwide Sales and Design Support.......................... 17
Products ....................................................................... 17
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