R2045 系列

4线串口实时时钟模块

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概述
规格
技术资料
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概述

R2045是内置晶体振荡器的实时时钟IC，通过四条信号线连接到CPU。将振荡频率调整到高精度（0±5ppm：相当于月差13秒）。另外，6种中断信号发射功能、2系统的警报功能、通电时等可应用于数据的有效判定的振荡停止检测功能、具有2值的阈值电压的电源电压监视功能。外置微型计算机的子时钟用32kHz时钟输出（Nch开启漏极）功能、该时钟具有高精度的数码时钟误差修正功能。而且，振荡电路是恒定电压驱动的，因此振荡频率的电压变动较小，实现了电流低耗（Typ. 0.48μA：3V时）。

规格

计时电源电压范围	1.15 V to 5.50 V
电源电流	Typ. 0.48 µA (VDD = 3 V)
连接到CPU	Four Signal Lines (CE, SCLK, SI, SO)
时钟输出	32.768 kHz (Nch Open Drain Output Controllable by command)
封装	SOP14
Built-in Crystal Oscillator	Oscillation Frequency Accuracy: 0 ±5 ppm

保护回路/功能

ECO	Clock Adjust	OSC Halt Sensing	Supply Voltage Monitoring Circuit	Automatic Identification of Leap Years	Selectable 12-hour and 24-hour	Backup Switch

功能说明

ECO	ECO Function
Clock Adjust	Clock Adjust Function
OSC Halt Sensing	OSC Halt Sensing Function
Supply Voltage Monitoring Circuit	Supply Voltage Monitoring Function
Automatic Identification of Leap Years	Automatic Identification of Leap Years
Selectable 12-hour and 24-hour	Selectable 12-hour and 24-hour
Built-in VD with Delay Time	Built-in VD with Delay Time

功能说明

ECO	ECO Function
Clock Adjust	Clock Adjust Function
OSC Halt Sensing	OSC Halt Sensing Function
Supply Voltage Monitoring Circuit	Supply Voltage Monitoring Function
Automatic Identification of Leap Years	Automatic Identification of Leap Years
Selectable 12-hour and 24-hour	Selectable 12-hour and 24-hour
Built-in VD with Delay Time	Built-in VD with Delay Time