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嗨，我正在为一个新的板奠定基础，将使用一个DSPIC33 EP512MU814这个芯片有JTAG，而我从来没有真正使用JTAG，并有一些别针，我想我也可以把它们放在一边以备将来使用（谁知道）！此外，我还可以用JTAG编程芯片，或者参考手册说：“无论如何，我的问题是：你知道JTAG/ICSP是否有一个标准的或通用的引脚/连接器？我知道20PIN /10PIN JTAG/SWD皮质调试引脚，但我找不到任何关于DSPIC/PIC32的信息……如果我最终使用它，我会使用一个已知的引脚/连接器准备就绪的电缆。
以上来自于百度翻译 以下为原文 Hi there, I'm in the process of laying the groundwork for a new board that will use a dsPIC33EP512MU814 This chip has JTAG and while I never actually used JTAG and have a few pins to spare i figured i could as well keep them aside for future use (who knows! Also, i see i can program the chip using jtag too, or so the reference manual says) Anyway, my question is: do you know if there is a standard or common pinout/connector for JTAG/ICSP? I know of the 20pin/10pin JTAG/SWD Cortex debug pinout but i couldn't find any info on dspic/pic32... In case i ever end up using it, i would have used a known pinout/connector with ready made cables 
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6个回答
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您好，在我看来，ICD4连接器类似于您所描述的（JTAG+ICSP）。它可以同时接收RJ11（ICSP）和RJ45（JTAG）（参见ICD4用户手册中的B.5.1节）。
以上来自于百度翻译 以下为原文 Hi, It seems to me that the ICD4 connector is similar to what you describe (JTAG + ICSP). It can receive both RJ11 (ICSP) and RJ45 (JTAG) (see section B.5.1 from the ICD4 user manual) Regards |
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您好，20针连接器似乎是最广泛的一个。原则上，JTAG适配器定义了引脚。事实上，我希望它最容易得到一个适配器的20针连接器。另外，对于每一个第二行是GND，信号串扰不应该是使用这个连接器的问题。ICD4 RJ45连接器是非常罕见的并且容易串扰。但它可以很容易地通过一个小适配器PCB适配到20针连接器。
以上来自于百度翻译 以下为原文 Hi, the 20-pin connector seems to be the most widespread one. In principle, the JTAG adapter defines the pinout. As it is I'd expect it the easiest to get an adapter for the 20-pin connector. PLUS: as about every second line is GND, signal crosstalk should not be an issue using this connector. The ICD4 RJ45 connector is quite uncommon and prone to crosstalk. But it could easily be adapted to the 20-pin connector via a small adapter PCB. |
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嗨，我考虑过了。我更喜欢使用0.1个或0.05个标题。板将被灌装，垂直安装RJ听起来昂贵。如果我用10针SWD怎么办？和MCLR交换NRST？
以上来自于百度翻译 以下为原文 Hi, I thought about it. I'd really prefer to use 0.1" or 0.05" headers. The boards will be potted, vertical mount RJ sounds expensive. What if i used the 10 pin swd? And exchange nRST with MCLR? |
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如果解决方案只针对你——打算与ICDs一起使用，你甚至可以使用8针连接器。（6引脚连接器有点难以获得。）在这种情况下，我建议路由1:1 -避免任何导线交叉。OK - 10引脚将允许PGC和PGD“屏蔽”的地线之间-最终提高信号完整性。这是我最喜欢的20针连接器的特性。
以上来自于百度翻译 以下为原文 If the solution is only for you - intended to be used with the ICDs, you could even use an 8-pin connector. (6-pin connectors are a bit difficult to get.) In this case I'd suggest to route 1:1 - avoiding any wire crossovers. OK - 10 pins would allow to have PGC and PGD "shielded" by ground wires inbetween - eventually improving signal integrity. Which is the feature I love most at the 20-pin connector. |
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嗨，请注意JTAG只支持边界扫描这一事实。它不支持编程（阅读家庭参考手册，用于编程诊断）（第14节）。
以上来自于百度翻译 以下为原文 Hi, Please pay attention to the fact that JTAG supports only boundary scan. It does not support programming (read Family Reference Manual for Programming Diagnostics) (section 14). Regards |
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不是吗？但是我阅读了参考手册，它说它确实通过命令的特殊子集实现了ICSP。我读的文档是Google“JTAG DSPIC”发现的，所以它可能是一个较旧的版本。稍后/明天我将检查在产品页中链接的文档。无论如何，该板将有我们的标准连接器（没有任何花哨，10引脚IDC，有编程引脚，一个UART和一些其他专用引脚）JTAG是“以防万一”我再次检查，由谷歌链接的文档。是DSSPICF参考手册，正如你所说的，33 E只有边界扫描。真倒霉
以上来自于百度翻译 以下为原文 It does not? But i read the reference manual and it said it does implement ICSP, via a special subset of commands. Well, the document i read was the one found by googling "jtag dspic" so it may have been an older version. Later/tomorrow i will check the document linked in the product page. Anyway, the board will have our standard connector (nothing fancy, a 10 pin IDC that has the programming pins, an UART and a couple of other dedicated pins) JTAG is there "just in case" I checked again, the document linked by google was the dsPIC33F reference manual, as you said 33E only has boundary scan. bummer |
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