PCF85263A参考设计电路|微型实时时钟/日历应用电路

PCF85263A微型实时时钟/日历是一个CMOS实时时钟（RTC）和日历，经过优化实现了低功耗，并可在主电源掉电时自动切至电池供电。此篇主要介绍了PCF85263A特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

PCF85263A由电池切换以及输入驱动事件所触发的三个时间记录寄存器。支持时钟输出和两路独立中断信号、两路警报、I2C接口和石英晶体校准。

PCF85263A特性：两个独立闹钟、电池后备电路、看门狗定时器、三个时间戳寄存器、两个独立中断发生器，加每秒、分钟或小时预定义中断、通过可编程偏移寄存器进行频率调节

PCF85263A典型应用范围包括：打印机、复印件、电子计量、数码相机、白色家电、越时计数器、网络受电设备、电池后备系统、数据记录器、数字录音器、移动设备、精确高耐用定时器。

PCF85263A参考设计应用电路：

图1PCF85263A内部结构框图

The PCF85363A contains 8-bit registers for time information, for timestamp information and registers for system configuration. Included is an auto-incrementing register address,an on-chip 32.768 kHz oscillator with integrated capacitors, a frequency divider which provides the source clock for the Real-Time Clock (RTC) and calender, and an I2C-bus interface with a maximum data rate of 400 kbit/s.

图2PCF85263A参考设计电路

The PCF85363A contains 8-bit registers for time information, for timestamp information and registers for system configuration. Included is an auto-incrementing register address,an on-chip 32.768 kHz oscillator with integrated capacitors, a frequency divider which provides the source clock for the Real-Time Clock (RTC) and calender, and an I2C-bus interface with a maximum data rate of 400 kbit/s.PCF85263A中文数据手册:点击下载

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