Cypress AutoStore STK17T88 Manual do Utilizador

STK17T8832K x 8 AutoStore™ nvSRAM withReal Time ClockCypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 •408-943-2600Doc

STK17T88Document Number: 001-52040 Rev. *A Page 10 of 22Hardware STORE CycleFigure 11. Hardware STORE CycleSoft Sequence CommandsFigure 12. Soft Se

STK17T88Document Number: 001-52040 Rev. *A Page 11 of 22MODE SelectionE W G A14-A0Mode I/O Power NotesH X X X Not Selected Output High Z StandbyL H L

STK17T88Document Number: 001-52040 Rev. *A Page 12 of 22nvSRAM OperationThe STK17T88 nvSRAM is made up of two functional compo-nents paired in the sa

STK17T88Document Number: 001-52040 Rev. *A Page 13 of 22Software STOREData can be transferred from the SRAM to the nonvolatilememory by a software ad

STK17T88Document Number: 001-52040 Rev. *A Page 14 of 22Real Time ClockThe clock registers maintain time up to 9,999 years inone-second increments. T

STK17T88Document Number: 001-52040 Rev. *A Page 15 of 22minute, have one second either shortened by 128 or lengthenedby 256 oscillator cycles.If a bi

STK17T88Document Number: 001-52040 Rev. *A Page 16 of 22Figure 15 is a functional diagram of the interrupt logic.Figure 15. Interrupt Block DiagramI

STK17T88Document Number: 001-52040 Rev. *A Page 17 of 22RTC Register Map*A binary value, not a BCD value.0 - Not implemented, reserved for future use

STK17T88Document Number: 001-52040 Rev. *A Page 18 of 22Register Map Detail0x7FFFReal Time Clock – Years D7 D6 D5 D4 D3 D2 D1 D010s Years YearsContai

STK17T88Document Number: 001-52040 Rev. *A Page 19 of 22WDW Watchdog Write Enable. Set this bit to 1 to disable writing of the watchdog time-out valu

STK17T88Document Number: 001-52040 Rev. *A Page 2 of 22Pin ConfigurationsFigure 1. 48-Pin SSOPVSSA14A12A7A6DQ0DQ1VCCDQ2A3A2A1VCAPA13A6A9A11A10DQ7DQ6

STK17T88Document Number: 001-52040 Rev. *A Page 20 of 22Ordering Codes0x7FF0FlagsD7 D6 D5 D4 D3 D2 D1 D0WDF AF PF OSCF 0 CAL W RWDF Watchdog Timer Fl

STK17T88Document Number: 001-52040 Rev. *A Page 21 of 22Package DiagramFigure 16. 48-Pin SSOP (51-85061)51-85061-*C[+] Feedback

Document Number: 001-52040 Rev. *A Revised March 17, 2009 Page 22 of 22AutoStore and QuantumTrap are registered trademarks of Cypress Semiconductor C

STK17T88Document Number: 001-52040 Rev. *A Page 3 of 22Absolute Maximum RatingsVoltage on Input Relative to Ground...–0.5V to 4.1VVolta

STK17T88Document Number: 001-52040 Rev. *A Page 4 of 22AC Test ConditionsInput Pulse Levels...0V to

STK17T88Document Number: 001-52040 Rev. *A Page 5 of 22RTC DC CharacteristicsFigure 4. RTC Component ConfigurationSymbol ParameterCommercial Industr

STK17T88Document Number: 001-52040 Rev. *A Page 6 of 22SRAM READ Cycles #1 and #2Figure 5. SRAM READ Cycle #1: Address Controlled[3,4,6]Figure 6. S

STK17T88Document Number: 001-52040 Rev. *A Page 7 of 22SRAM WRITE Cycles #1 and #2Figure 7. SRAM WRITE Cycle #1: W Controlled[7, 8]Figure 8. SRAM W

STK17T88Document Number: 001-52040 Rev. *A Page 8 of 22AutoStore/Power Up RECALLFigure 9. AutoStore Power Up RECALLNotes9. tHRECALL starts from the

STK17T88Document Number: 001-52040 Rev. *A Page 9 of 22Figure 10. Software Store/Recall Cycle: E CONTROLLED[13]Software-Controlled STORE/RECALL Cycl