[问答]

PIC24 SOSC低/高功耗模式？

问答对人有帮助，内容完整，我也想知道答案 0 我试图找到低/高功率模式的SSOC（二次振荡器）时，使用外部的32 kHz晶体，似乎是没有详细的家庭数据表（PIC24F16KA101），也没有RTCC/OSC参考数据表。以上来自于百度翻译以下为原文 I am trying to find details of the Low/High power modes for the SOSC (secondary oscillator) when using an external 32KHz crystal, seems to be no details in the Family data sheet (PIC24F16KA101) nor the RTCC / OSC reference datasheets. 0
2018-9-26 10:07:11　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × qun333 该类别下有 57 个回答。邀请回答 caoguiqun 该类别下有 56 个回答。邀请回答技术发广告该类别下有 56 个回答。邀请回答 psw30 该类别下有 44 个回答。邀请回答伊丹姿子该类别下有 41 个回答。邀请回答 uwufwjrw 该类别下有 39 个回答。邀请回答 hetao1111 该类别下有 38 个回答。邀请回答 lc123617 该类别下有 35 个回答。邀请回答欧阳大大该类别下有 32 个回答。邀请回答作死不止该类别下有 31 个回答。邀请回答 asd010 该类别下有 31 个回答。邀请回答 60user92 该类别下有 29 个回答。邀请回答 wy8719 该类别下有 29 个回答。邀请回答嘻嘻爱哈哈该类别下有 28 个回答。邀请回答 haikitty 该类别下有 28 个回答。邀请回答 ju978779 该类别下有 28 个回答。邀请回答 xiuzhen122 该类别下有 27 个回答。邀请回答 pol666 该类别下有 27 个回答。邀请回答 ueywyrsdfs 该类别下有 26 个回答。邀请回答 lhly23 该类别下有 25 个回答。邀请回答举报宫素香相关推荐 • PIC24 RTCC报警中断 1072 • pic24 Interrupt函数编译不过去 2488 • pic24系列 flash驱动的源码 2750 • 有人在PIC24上有FieltoS+IO的经验吗？ 920 • 问论坛大侠如何操作dsPIC33/PIC24系列中32位定时器的读/写操作？ 2219 • PIC24/PIC18波形发生器 2150 • IR数据库可用于PIC24微控制器吗？ 1380 • pickit3 44针如何演示板上的PIC24 1238 • 怎么做一个PIC24到PIC24 SPI 3263 • 如何解决PIC24和dsPIC设备的数据加密例程问题 1215 1个回答

答案对人有帮助，有参考价值 0 嗨，关于晶体和连接元件的一些应用注意事项，理论和实际实验都有特定的晶体产品和元件价值。但是它们都结束了，你们必须在最低和高度上自己做测试和/或测量。在产品预期工作的温度下，WW1.MICCHIP.CON/LIPSHON/En/AppNoSe/90001798A.PDF-现代音叉“手表”晶体在晶体和小值电容器之间循环非常小的功率水平工作。封装引脚、键合线和PCB迹线的电容，按具有电容器，并可能足以晶体振荡。PIC振荡器放大器的早期版本，与一个串联电阻在大约220千欧的范围内与驱动引脚串联。在PIC中的振荡器放大器有自动增益控制。试图保持晶体OS。在现代PIC24器件中采用极低的功耗，MICROCSCLE似乎设计了一种不用串联电阻的放大器。在晶体振荡器驱动引脚上的电压电平将小于1伏峰到峰值，即使在高功率模式下，也很难测量，因为C任何示波器探头的电容都会改变电路中的条件。我用1/100探针来观察晶体是如何工作的，但这是电路的高功率配置。在一些产品中，在PIC32 MZ器件中，似乎已经过低功耗设计。次级晶体振荡器根本不工作。迈西尔以上来自于百度翻译以下为原文 Hi, There have been several Application Notes on the subject of Crystals and connected components, both theoretical, and practical experiments with specific crystal products and component values. but they all end up saying that you have to do tests and/or measurements yourself, at the lowest and highest temperature where product is expected to work. ww1.microchip.com/downloads/en/AppNotes/00001798a.pdf Modern tuning fork "watch" crystals work with very small power levels circulating between the crystal and small value capacitors. Capacitance of package pins, bonding wires and PCB traces, act in perallell with capacitors, and may be sufficient for crystal to oscillate. Earlier versions of PIC oscillator amplifiers, work with a series resistor in the range around 220 kOhm in series with the drive pin. There is Automatic Gain Control in the oscillator amplifier in the PIC. Trying to keep Crystal oscillating with extreme low power consumption in the PIC, in modern PIC24 devices, Miccrochip seem to design amplifier to be used without a series resistor. Voltage level on crystal oscillator drive pin, will be less than 1 volt peak to peak, even in high power mode, it is difficult to measure, since capacitance of any oscilloscope probe will change conditions in the circuit. I have used a 1/100 probe to get a impression of how the crystal is working, but that is with circuits in High-power configuration. In some products, it may seem the Low-power design have been taken too far, in PIC32MZ devices, the Secondary Crystal Oscillator do not work at all. Mysil

2018-9-26 10:21:53 评论举报李铭鑫