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CY14B101KA-SP25XI Datasheet(PDF) 11 Page - Cypress Semiconductor |
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CY14B101KA-SP25XI Datasheet(HTML) 11 Page - Cypress Semiconductor |
11 / 34 page CY14B101KA CY14B101MA Document #: 001-42880 Rev. *I Page 11 of 34 Flags Register The flags register has three flag bits: WDF, AF, and PF, which can be used to generate an interrupt. These flags are set by the watchdog timeout, alarm match, or power fail monitor respectively. The processor can either poll this register or enable interrupts to be informed when a flag is set. These flags are automatically reset when the register is read. The flags register is automatically loaded with the value 0x00 on power-up (except for the OSCF bit; see Stopping and Starting the Oscillator on page 9). Figure 4. RTC Recommended Component Configuration Xout Xin Y1 C2 C1 Recommended Values Y1 = 32.768 kHz (12.5 pF) C1 = 10 pF C2 = 67 pF Note: The recommended values for C1 and C2 include board trace capacitance. 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 Enable Watchdog Timer Power Monitor Clock Alarm VINT WDF WIE PF PFE AF AIE P/L Pin Driver H/L INT VCC VSS [+] Feedback |
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