Datasheet > PCF212HA

PCF212HA

更新时间： 2024-11-20 10:16:47

品牌	Logo	应用领域
恩智浦 - NXP		时钟
页数	文件大小	规格书
63页	828K
描述
SPI Real time clock/calendar Time keeping application

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PCF212HA 数据手册

PCF2123

SPI Real time clock/calendar

Rev. 5 — 27 April 2011

Product data sheet

1. General description

The PCF2123 is a CMOS¹Real-Time Clock (RTC) and calendar optimized for low power

applications. Data is transferred serially via a Serial Peripheral Interface (SPI-bus) with a

maximum data rate of 6.25 Mbit/s. An alarm and timer function is also available providing

the possibility to generate a wake-up signal on an interrupt pin. An offset register allows

fine tuning of the clock.

2. Features and benefits

Real time clock provides year, month, day, weekday, hours, minutes, and seconds

based on a 32.768 kHz quartz crystal

Low backup current while running: typical 100 nA at V_DD= 2.0 V and T_amb= 25 °C

Resolution: seconds to years

Watchdog functionality

Freely programmable timer and alarm with interrupt capability

Clock operating voltage: 1.1 V to 5.5 V

3 line SPI-bus with separate, but combinable data input and output

Serial interface at V_DD= 1.6 V to 5.5 V

1 second or 1 minute interrupt output

Integrated oscillator load capacitors for C_L= 7 pF

Internal Power-On Reset (POR)

Open-drain interrupt and clock output pins

Programmable offset register for frequency adjustment

3. Applications

Time keeping application

Battery powered devices

Metering

High duration timers

Daily alarms

Low standby power applications

1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 21.

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