Cypress STK17TA8 - Manuals

STK17TA8 Document #: 001-52039 Rev. ** Page 8 of 23 AutoStore/Power Up Recall Figure 9. AutoStore/Power Up RECALL Notes 9. t HRECALL starts from the time V CC rises above V SWITCH 10. If an SRAM WRITE has not taken place since the last nonvolatile cycle, no STORE will take place11. Industrial Grade ...

STK17TA8 Document #: 001-52039 Rev. ** Page 10 of 23 Hardware STORE Cycle Figure 12. Hardware STORE Cycle Soft Sequence Commands Figure 13. Soft Sequence Commands NO. Symbols Parameter STK17TA8 Units Notes Standard Alternate Min Max 31 t DELAY t HLQZ Hardware STORE to SRAM Disabled 1 70 μ s 14 32 t ...

STK17TA8 Document #: 001-52039 Rev. ** Page 11 of 23 MODE Selection E W G A 16 -A 0 Mode I/O Power Notes H X X X Not Selected Output High Z Standby L H L X Read SRAM Output Data Active L L X X Write SRAM Input Data Active L H L 0x04E38 0x0B1C7 0x083E0 0x07C1F 0x0703F Read SRAM Read SRAM Read SRAM Re...

STK17TA8 Document #: 001-52039 Rev. ** Page 12 of 23 nvSRAM Operation The STK17TA8 nvSRAM is made up of two functional compo- nents paired in the same physical cell. These are the SRAM memory cell and a nonvolatile QuantumTrap cell. The SRAM memory cell operates like a standard fast static RAM. Data...

STK17TA8 Document #: 001-52039 Rev. ** Page 13 of 23 atile elements. Once a STORE cycle is initiated, further memory inputs and outputs are disabled until the cycle is completed.To initiate the Software STORE cycle, the following read sequence must be performed: 1. Read Address 0x4E38 Valid READ2. R...

STK17TA8 Document #: 001-52039 Rev. ** Page 14 of 23 Figure 15. Current versus Cycle Time RTC Operations Real Time Clock The clock registers maintain time up to 9,999 years in one second increments. The user can set the time to any calendar time and the clock automatically keeps track of days of the...

STK17TA8 Document #: 001-52039 Rev. ** Page 15 of 23 Calibrating The Clock The RTC is driven by a quartz controlled oscillator with a nominal frequency of 32.768 KHz. Clock accuracy will depend on the quality of the crystal, specified (usually 35 ppm at 25 C). This error could equate to 1.53 minutes...

STK17TA8 Document #: 001-52039 Rev. ** Page 16 of 23 Interrupts The STK17TA8 has a Flags register, Interrupt Register, and interrupt logic that can interrupt a microcontroller or generate a power-up master reset signal. There are three potential interrupt sources: the watchdog timer, the power monit...

STK17TA8 Document #: 001-52039 Rev. ** Page 17 of 23 RTC Register * A binary value, not a BCD value. 0 - Not implemented, reserved for future use.Default Settings of nonvolatile Calibration and Interrupt registers from factoryCalibration Register=00hInterrupt Register=00hThe User should configure to...

STK17TA8 Document #: 001-52039 Rev. ** Page 18 of 23 Register Map Detail 0x1FFFF Real Time Clock – Years D7 D6 D5 D4 D3 D2 D1 D0 10s Years Years Contains the lower two BCD digits of the year. Lower nibble contains the value for years; upper nibble contains the value for 10s of years. Each nibble ope...

STK17TA8 Document #: 001-52039 Rev. ** Page 22 of 23 Package Diagrams Figure 17. 48-Pin SSOP (51-85061) 51-85061 *C [+] Feedback

Document #: 001-52039 Rev. ** Revised March 02, 2009 Page 23 of 23 AutoStore and QuantumTrap are registered trademarks of Cypress Semiconductor Corporation. All products and company names mentioned in this document are the trademarks of their respective holders. STK17TA8 © Cypress Semiconductor Corp...