Creator 2.0中的PSoC 5需要用于USB的XTAL时钟

PSOC5IMO没有它应该的那样好，我想你需要用PoS5与USB的晶体。我认为PSOC3应该没有XTAL。



     以下为原文
  PSOC5 IMO is not as good as it supposed to be, I think you need crystal for PSOC5 with USB. The PSOc3 should be OK without xtal I think.

是否有必要将外部晶体作为PSOC5器件的时钟源？
这取决于使用PSOC5的应用。PSOC5设备家族在IMO上具有5%的容忍度。如果您的PSOC5应用程序具有严格的时序要求，则必须有一个精确的时钟源。特别地，对于具有UART或USB的通信组件的项目，必须使用PSOC5使用外部MHz晶体。



     以下为原文
  Is it mandatory to have an external crystal as the clock source for PSoC5 device?
    It depends on the application in which PSoC5 is used. The PSoC5 device family has a tolerance of 5% on the IMO. If your PSoC5 application has strict timing requirements it is necessary to have an accurate clock source. Especially, for projects that have communication components such as UART or USB, it is mandatory to use external MHz crystal with PSoC5

下面列出的是PSOC5的推荐晶体和电容器。
CY8CKIT-050:
Y3
晶体24.000兆赫20PF SMD
ECS公司
ECS-240－205PX-TR
C30，C31
CAP，CER，22 PF，50V，5%，COG，0603，SMD
松下心电图
ECJ-0EC1H220J
CY8CKIT-010:
Y2
晶体，24兆赫，30 ppm，HC49，SMD
ECS公司
ECS-240－125PX-TR
C26，C27
CAP，CER，12 PF，50V，5%，COG，0603，SMD
村田电子北美公司
GRM1885 C1H120 JA01D
在CY8CKIT-010（PSoC CY8C55处理器模块）的情况下，晶体和相应的电容器（C26和C27）应该如下图所示安装：
如果cy8ckit-050，水晶和相应的电容器（C30、C31）应安装如下图所示：



     以下为原文
  Listed below are the recommended crystal and the capacitors for PSoC5.
    CY8CKIT-050:
                                                                                                 

Y3	CRYSTAL 24.000MHZ 20PF SMD	ECS Inc	ECS-240-20-5PX-TR
C30,C31	CAP, CER, 22 pF, 50V, 5%, COG, 0603, SMD	Panasonic - ECG	ECJ-0EC1H220J

     
    CY8CKIT-010:
     
                                                                                                 

Y2	CRYSTAL, 24 MHz, 30 ppm, HC49, SMD	ECS Inc	ECS-240-12-5PX-TR
C26,C27	CAP, CER, 12 pF, 50V, 5%, COG, 0603, SMD	Murata Electronics North America	GRM1885C1H120JA01D

     In case of CY8CKIT-010 ( PSoC CY8C55 Processor Module) the crystal and the corresponding capacitors(C26 and C27) should be mounted as shown in the picture below:
     
     
     
    In case of CY8CKIT-050, the crystal and the corresponding capacitors(C30 and C31) should be mounted as shown in the picture below:

     
   

为了在PSoC Creator项目中使用外部MHz晶体，需要在项目的设计范围内的资源文件中进行以下设置：



     以下为原文
   In order to use the external MHz crystal in your PSoC Creator project, the following setting needs to be done in the Design Wide resource file of the project: