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有没有办法围绕GPIO引脚被冻结在深度睡眠或如果你想保持输出引脚活跃,你必须使用更高的当前睡眠模式吗?
我需要在一个外部IC上连续地产生一个31.25 kHz的输出信号,因为我正在使用的晶体正在过时。 该项目目前将4200人置于深度睡眠中,醒来过程短时间并回到睡眠状态。 我可以生活在1Ma的消费(虽然更少更好)。睡眠模式似乎是大约1.5至3.7Ma,如果我使用内部OSC在3MHz。 以上来自于百度翻译 以下为原文 Is there any way around GPIO pins being frozen during deep sleep or do you have to use the higher current Sleep mode if you want to keep an output pin active? I need to produce a 31.25 khz output signal on a pin continuously for an external IC because the crystal I was using on that IC is becoming obsolete. The project currently puts 4200 into deep sleep, wakes to process for short time and goes back to sleep. I could live with up to 1mA consumption (though less is better). Sleep mode seems to be around 1.5 to 3.7mA if I use internal osc at 3MHz. |
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3个回答
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您可以使用LFCLK作为时钟组件,并将其击穿到引脚。应该在深睡眠中使用32千赫。
然后尝试使用31.25千赫XTAL并启用WCO。测试是否正确运行。 鲍勃 以上来自于百度翻译 以下为原文 You could use the LFCLK as a clock component and rout that to a pin. Should work in deep sleep with 32kHz. Then try to use a 31.25 kHz xtal and enable the WCO. Test if that runs correctly. Bob |
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ncmza 发表于 2018-10-4 06:42 鲍勃, 我知道LFCLK是非常不准确的(60%公差),如果我连接一个外部31.25千赫晶体到微,那么我不妨把它留在外部设备,因为它是现在,我仍然有问题的组件变得过时。 如果不是晶体变过时,我就不需要改变微电路。我的想法是,使用标准晶体(例如4MHz)的微型意味着我有一个免费的可用的晶体为基础的31.25 kHz信号的产生,但目前的消费将太高。 以上来自于百度翻译 以下为原文 Bob, I understand the LFCLK is very inaccurate (60% tolerance), If I connect an external 31.25 kHz crystal to the micro then I might as well leave it on the external device as it is now and I still have the problem of the component becoming obsolete. If not for the crystal becoming obsolete, I would not need to change the micro circuit. My thinking is that using the micro with a standard crystal (say 4Mhz) means I have a freely available crystal-based generation of the 31.25 kHz signal now but the current consumption will be too high. |
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hnui2002 发表于 2018-10-4 06:54 一些BLE模块有一个内置的手表晶体板上,您可以尝试其中之一,并使用WCO,但时钟是在32.768千赫,而不是31.25千赫,你想要的。否则,用时钟除法器组件将时钟路由到输出引脚可以工作… 以上来自于百度翻译 以下为原文 Some of the BLE modules have a built in watch crystal on-board; You could try one of those and use the WCO, but the clock is at 32.768 kHz instead of the 31.25 kHz that you want. Otherwise, routing a clock to the output pin with a clock-divider component may work... |
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