Xout Xin, WDF Watchdog Timer Flag, Pulse Level


		PRELIMINARY	CY14B108K, CY14B108M
			CY14B108K, CY14B108M

		Figure 4. RTC Recommended Component Configuration
		Figure 4. RTC Recommended Component Configuration

Xout

Xin

Recommended Values

Y1 = 32.768 KHz (6 pF)

C1 = 21 pF

C2 = 21 pF

Note: The recommended values for C1 and C2 include board trace capacitance.

Figure 5. Interrupt Block Diagram

Watchdog

Timer

Power

Monitor

VINT

Clock

Alarm

WDF

WIE

PFE

AIE

	P/L		VCC

Pin Driver

H/L VSS

	WDF - Watchdog Timer Flag
	WIE - Watchdog Interrupt
	Enable
	PF - Power Fail Flag
INT	PFE - Power Fail Enable
INT	AF - Alarm Flag
	AIE - Alarm Interrupt Enable
	P/L - Pulse Level
	H/L - High/Low

Document #: 001-47378 Rev. **

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Cypress CY14B108K Xout Xin, WDF Watchdog Timer Flag, WIE Watchdog Interrupt, PF Power Fail Flag, PFE Power Fail Enable

Contents

Functional Description FeaturesLogic Block Diagram1, 2 Cypress Semiconductor Corporation Pinouts Sram Write Device OperationSram Read AutoStore Operation Software Recall Hardware Recall Power UpHardware Store HSB Operation Software Store Preventing AutoStore Mode SelectionA15 A05 Mode Power Store Data Protection Best Practices Noise Considerations Real Time Clock Operation Watchdog Timer AlarmCalibrating the Clock Interrupts Power MonitorInterrupt Register Flags Register PFE Power Fail Enable WDF Watchdog Timer FlagPF Power Fail Flag AF Alarm Flag WDS OscenWDF Oscf 0xFFFF9 0x7FFF9 Time Keeping Seconds For the register is 0 to Write only. Reading it always returns a 0xFFFF5 0x7FFF5 Alarm DayTime-base 0xFFFF6 0x7FFF6 Interrupt Status/Control Watchdog 0xFFFF2 0x7FFF2 Alarm SecondsCenturies 0xFFFF0 0x7FFF0 Flags This condition and write 0 to clear this flag Maximum Ratings DC Electrical CharacteristicsRange Ambient Temperature Operating Range Thermal Resistance Data Retention and EnduranceCapacitance AC Test Conditions RTC Battery Pin Voltage RTC Backup CurrentHot Temperature 85 oC RTC Capacitor Pin Voltage TOCS RTC Oscillator Time to Start Parameters Sram Read Cycle AC Switching CharacteristicsSwitching Waveforms Sram Write Cycle Address Address Valid Data Output High Impedance Output Data ValidStandby Active Data Input Input Data Valid Not applicable for RTC register writes Data Input Data OutputInput Data Valid High Impedance Data Input Input Data Valid High Impedance Data Output AutoStore/Power Up Recall Parameters Description 20 ns 25 ns 45 ns Unit Min Max Software Controlled Store and Recall Cycle Description 20 ns 25 ns 45 ns Unit Min To Output Active Time when write latch not setHardware Store Cycle Hardware Store Pulse Width Inputs and Outputs Mode Power For x8 ConfigurationFor x16 Configuration Truth Table For Sram Operations ZS Tsop Part Numbering Nomenclature CY14 B 108 K ZS P 20 X C TNvsram Ordering Information Package Diagrams Pin Tsop II 51-85160 New Data Sheet Sales, Solutions, and Legal InformationWorldwide Sales and Design Support Products PSoC Solutions Document History

Figure 4. RTC Recommended Component Configuration

Xout

Xin

Figure 5. Interrupt Block Diagram

WDF - Watchdog Timer Flag

WIE - Watchdog Interrupt

PF - Power Fail Flag

PFE - Power Fail Enable

AF - Alarm Flag

AIE - Alarm Interrupt Enable

P/L - Pulse Level

H/L - High/Low