CY14B101MA(2011) Ver la hoja de datos (PDF) - Cypress Semiconductor

Número de pieza

componentes Descripción

Fabricante

CY14B101MA
(Rev.:2011)

1-Mbit (128 K × 8/64 K × 16) nvSRAM with Real Time Clock

Cypress Semiconductor 

CY14B101KA

CY14B101MA

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

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.

C1

Y1

C2

Xout

Xin

Figure 5. Interrupt Block Diagram

Watchdog

Timer

Power

Monitor

VINT

Clock

Alarm

WDF

WIE

PF

PFE

AF

AIE

P/L

VCC

Pin

Driver

INT

H/L

VSS

WDF - Watchdog Timer Flag

WIE - Watchdog Interrupt

Enable

PF - Power Fail Flag

PFE - Power Fail Enable

AF - Alarm Flag

AIE - Alarm Interrupt Enable

P/L - Pulse Level

H/L - High/Low

Document #: 001-42880 Rev. *I

Page 11 of 34

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