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DS1337时间不准确

ihep2008
菜鸟
2011-01-25 09:29:21     打赏
买回来一批DS1337实时时钟芯片，测试后发现芯片有的快、有的慢，偏差在每天10秒钟左右不等。DS1337的数据资料里面介绍说这款RTC准确度很高，但不知道为什么实际测试会有这么大的偏差？
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关键词： DS1337     时间     不准确    


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halibote523
专家
2011-01-25 10:04:39     打赏
2楼
可能原因：
1、I2C的时序有点问题
2、电压的不稳定

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halibote523
专家
2011-01-28 09:46:45     打赏
3楼
这也是有可能的！！！

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ihep2008
菜鸟
2011-01-28 13:49:13     打赏
4楼

芯片工作的温度变化是不是也会引起时间的偏差。


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halibote523
专家
2011-01-28 14:12:10     打赏
5楼
芯片温度太高的话会，但是一般的芯片温度不是很高的！
也有可能你写时钟的时候时序有问题

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ihep2008
菜鸟
2011-02-09 14:28:38     打赏
6楼

有关电源电压、芯片工作温度以及晶振对RTC的影响我都能够理解。而写时钟的时序对RTC的精度的影响我就理解的不深刻了。
halibote523，您讲的是主机的时间在写入RTC时出现偏差导致RTC的误差吗？还是其它动作引起的误差？


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hopping
菜鸟
2012-03-10 22:00:34     打赏
7楼

楼主的问题解决了吗？我现在也遇到这个问题了，头疼啊


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