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[问答]

无法连接到PIC32MX

MPLABX V3.51现在为目标设备下载新的固件:PIC32 MX530F128H下载AP…AP下载完成编程下载…当前加载的固件在真正的ICE固件套件版本…01.4614固件类型……PIC32 MX目标电压检测到不能连接到目标DE副设备。未能获得设备IDPIC32 MX530F128H i-PtiT不与ICD3或实际ICE3.3 VDC到0.1和0.01uF陶瓷到Pin 1019,26,35,3557 3.3V固体无振荡。在引脚9,20,25,41,10UF陶瓷到引脚56的Vcap(3.3伏)的理由(固体无振荡)PEGC是PIN 17(PEGC2)PEGD是PIN 18(PEGD2)MCLCR 10K脉冲信号,信号看起来好,没有连接到它们。有什么建议,下一步检查什么?

以上来自于百度翻译


      以下为原文

    MPLabX V3.51

Now Downloading new Firmware for target device: PIC32MX530F128H
Downloading AP...
AP download complete
Programming download...
Currently loaded firmware on REAL ICE
Firmware Suite Version.....01.46.14
Firmware type..............PIC32MX
Target voltage detected
Unable to connect to the target device.
Failed to get Device ID


PIC32MX530F128H I-PT

It does not work with an ICD3 or Real Ice

3.3 Vdc to 0.1 and 0.01uf ceramic to Pin10,19,26,35,38,57
3.3V solid no oscillation.
Grounds at Pin 9, 20,25,41,
10uF ceramic to Vcap at Pin 56 (which measures 3.3V  ??) (solid no oscillation)
PEGC is to Pin 17  (PEGC2)
PEGD is to Pin 18 (PEGD2)
MCLCR 10K Pullup
The Signals look ok and have nothing connected to them.

Any suggestions about what to check next?


回帖(13)

王焕树

2019-2-28 13:50:56
你有可能尝试另一个PGEC/PGD对吗?例如PGEC1/PGED1在引脚15 + 16?

以上来自于百度翻译


      以下为原文

    Is there any chance you could try another PGEC/PGED pair?
e.g. PGEC1/PGED1 on pins 15+16 ?
 
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陈晨

2019-2-28 14:05:50
这是TQFP,所以不是真的。勘误表没有显示和发出问题。

以上来自于百度翻译


      以下为原文

    It is a TQFP, so not really. the Errata does not show and issues.
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杨叶

2019-2-28 14:23:42
嗨,如果你看到VCAP= 3.3V,那么你真的有一个硬件问题……根据数据表,Vcap电压应该在1.8V左右(数据表参数D321)。

以上来自于百度翻译


      以下为原文

    Hi,
If you see Vcap = 3.3V then you really have an hardware issue....According to the datasheet, Vcap voltage should be around 1.8V (datasheet parameter D321).
See also section 28.3.3
Regards
 
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陈晨

2019-2-28 14:43:37
我看到了VCCAP上的2.5,它将重置它。但是为什么会发生这种情况呢?我从图2-1中看到的老差别是AVdd是由一个不同的调节器提供动力的。

以上来自于百度翻译


      以下为原文

    I saw that and > 2.5 on Vcap will hold it in reset.
But why would that happen?
The old difference I have from FIGURE 2-1 is AVdd is powered from a different regulator.
 
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