RS5C372A数据手册集成电路（IC）的实时时钟规格书PDF

描述 Description

The RS5C372A is a CMOS type real-time clock which is connected to the CPU via 2-wires and capable of serial transmission of clock and calendar data to the CPU.The RS5C372A can generate various periodic interrupt clock pulses lasting for long period (one month), and alarm interrupt can be made by days of the week, hours, and minutes by two incorporated systems. Since an oscillation circuit is driven at a constant voltage, it undergoes fluctuations of few voltage and consequently offers low current consumption (Typ. 0.5 µA at 3V). It also provides an oscillator halt sensing function applicable for data validation at power-on and other occasions and 32-kHz clock output for an external micro computer. (Nch. open drain output) The product also incorporates a time trimming circuit that adjusts the clock with higher precision by adjusting any errors in crystal oscillator frequencies based on signals from the CPU. The crystal oscillator may be selected from 32.768 kHz or 32.000 kHz types. Integrated into an ultra compact and ultra thin 8-pin SSOP package, the RS5C372A is the optimum choice for equipment requiring small sized and low power consuming products.

特性 Features

·Time keeping voltage：1.3 V to 6.0 V；
·Supply Current：TYP. 0.5 µA；
·Connected to the CPU：Only 2 wires (I2C bus Interface, MAX.400 kHz, address 7 bits)；
·Clock Output：32.768 kHz or 32.000 kHz (Output controllable via a register), Nch. open drain output；
·Oscillator：32.768 kHz or 32.000 kHz may be used；
·Functions：A clock counter (counting hours, minutes, and seconds) and a calendar counter (counting leap years, years, months, days, and days of the week) in BCD codes；
·Interrupt to the CPU (period of one month to one second, interrupt flag, interrupt halt function) (INTRA, INTRB)；
·Two systems of alarm functions (days of the week, hours, and minutes) (INTRA, INTRB)；
·Oscillation halt sensing to judge internal data validity；
·Second digit adjustment by ±30 seconds；
·Automatic leap year recognition up to the year 2099；
·12-hour or 24-hour time display selectable；
·Built-in Circuits：Oscillation stabilizing capacity (CG, CD)；
·High precision time trimming circuit；
·Package：8-pin SSOP；

应用 Application

·Home appliances such as refrigerators, rice cookers, and electric pots
·Digital appliances such as laptops, digital TVs, DSCs, camcorders, mobile phones, and private LAN system
·Office appliances such as copiers, printers, facsimiles, scanners, and projectors

简介

RS5C372A属于集成电路（IC）的实时时钟。由制造生产的RS5C372A实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器，接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。