如题，有木有支持helium系列芯片的开发板，或者支持能运行isos系统的芯片的开发板
2013-07-17 11:48
何谓神经网络处理指令？有什么作用？Armv8.1-M核心实施选项包括哪些？
2021-06-29 09:07
请问一下CMSIS5.7.0怎么样？
2021-10-22 08:54
请问ARM Cortex-M55怎么样？
2022-01-26 06:15
我正在考虑KSZ8999 I以太网交换机的8端口连接控制器。我需要这个控制器的功耗计算。请确认是否需要散热器或风扇来充分利用这个控制器。谢谢和问候，Ashok Wakode。 以上来自于百度翻译 以下为原文 I amthinking about KSZ8999I Ethernet switch controller for 8 port connection.Irequire power consumption calculation of this controller .Please confirm whether it will require heat sink or fan for full utilisation of this controller.Thanks and Regards,Ashok Wakode
2019-01-24 09:07
ARM Cortex-M55处理器是第一个采用ARMv8.1-M架构的处理器，该架构包括ARM Helium技术(也称为M-profile矢量扩展(MVE))的实现。Helium技术可在下一代嵌入式
2022-03-31 10:40
什么是低功耗广域网？理想的低功耗广域网属性有哪些？
2021-05-14 06:09
请问一下怎样去烧写TMS320F2812呢？
2021-10-15 08:09
首先，祝大家圣诞快乐。我花了一些圣诞节来讨论我的8720D VNA - 它是由我个人拥有的，因此在我的家里，所以它不像它看起来那么不干净！我感兴趣的是看一个未连接的公N连接器是否可以用作“开放式”校准设备，如果是，那么哪个参数最好。好吧，我知道它可以完成，因为FieldFox系列上的QuickCal可以做到这一点，但当然我需要参数进入VNA。如果他们是安捷伦的老手，我也不会感到惊讶。首先使用适当的'N'校准套件（85032B）进行校准后，我注意到以下情况。 1）令我惊讶的是，开放式N似乎不是电容性的，因为我认为由于边缘电容。相反，它似乎是归纳的。是否能够通过值为2的电容器来表示电感。中心导体位于参考平面下方约1 mm。鉴于真空中的光速为299792458 m / s，这表明输入的偏移应为-0.001 / 299792458 = -3.335 ps。那有意义吗？也许值得说明偏移几ps - 使其更负面，因此可以将电容作为正值输入。我不确定这是否比使用负电容更好或更差。对于它的价值，我最初尝试通过曲线拟合找到C0，C1，C2和C3的合理值并不太成功，但我怀疑它有更多的时间可能是可行的。如果有人试过这个，或者知道参考文献，我会感兴趣的。你可能觉得我很生气，但现在是圣诞节，所以我喝了一两杯啤酒！有了这一切，一切顺利。我要去爱尔兰咖啡吧！ （这在英国很受欢迎 - 对美国不太确定。我猜你可以用杰克丹尼尔威士忌制作它。）如果我说实话，我用一种廉价的苏格兰威士忌制作“爱尔兰咖啡”。我认为将更昂贵的爱尔兰威士忌放入咖啡中是不合理的。戴夫 以上来自于谷歌翻译 以下为原文First of all, merry Christmas to everyone. I've spent some of Christmas day messing around with my 8720D VNA - it is personally owned by me, hence in my home, so it was not quite as unsociable as it might appear! I was interested in see if an unconnected male N connector could be used as an "open" calibration device, and if so what parameters would be best. Well, I know it can be done, as the QuickCal on the FieldFox range do this, but of course I needed the parameters to enter into the VNA. and I would not be surprised if they are proprietry to Agilent. I noticed the following, after first calibrating with a proper 'N' calibration kit (85032B). 1) Much to my surprise, the open-N does not appear to be capacitive, as I would have thought due to the fringing capacitance. Instead, it appears inductive. Would it make sence to represent an inductance by capacitor of a value < 0 ? I found it is possible to enter negative values for all value C0, C1, C2 and C3. . 2) The centre conductor sits below the reference plane by about 1 mm. Given the velocity of light in a vacuum is 299792458 m/s, that would suggest the offset to be entered should be -0.001/299792458 = -3.335 ps. Does that make sense? Perhaps it is worth lying about the offset by a few ps - making it even more negative so it is possible to enter the capacitance as a positive value. I'm not sure if that would be better or worst than having negative capacitors. For what it is worth, my initial attempts to find sensible values for C0, C1, C2 and C3 by curve fitting were not too successful, but I suspect with more time it might be workabe. If anyone has ever tried this, or knows of a reference, I'd be interested. You probably think I am mad, but it is Christmas day, so I have had a beer or two! With that, all the best. I'm going to have an Irish Coffee! (That's quite popular in the UK - not so sure about the USA. I guess you could make it with Jack Daniels whisky.) If I'm honest, I make an "Irish Coffee" using a cheapish Scotish whisky. I think putting the more expensive Irish whisky in a coffee is not justified. Dave
2019-04-28 11:34
