About cy7c65215 question

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Robin_Peng
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您好,

客户在调试 cy7c65215的时候,在CY的评估板上测试是OK的,把相同的配置文件,下载到客户自己板子上后,测试发现无法识别这个芯片,请问这是什么原因?谢谢

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YiZ_31
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这个配置文件是根据实际情况决定的,该选什么就选什么。如果还是有问题那客户要检查下PCB了。

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YiZ_31
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您这个配置里面选的是BUS Powered还是Self powered?

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Robin_Peng
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您好,客户配置里面选的是BUS Powered,谢谢

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YiZ_31
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所以选错啊了,你这个原理图上显然不是BUS Powered

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Robin_Peng
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您好,

请问下bus power和self power有什么区别,我在datasheet上没找到详细的描述,是否有相关的文档可以分享,谢谢。

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YiZ_31
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VBUS power 就是VBUS这个脚由USB接口的VBUS供电。

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Robin_Peng
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您好,

那self power就是不用usb接口的vbus供电,是吧?谢谢

pastedImage_0.png

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YiZ_31
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Self Power就是CY7C65215的供电来源不来自于VBUS

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Robin_Peng
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好的,谢谢,

目前客户在CYUSBS236

评估板上进行测试,没有问题的,相同的配置,放在客户板卡上,就找不到CY7C65215,

请问下:(1)这两种模式如果配置文件配置的不对会造成什么现象?(2)在评估板上不管配置文件配置的对不对、J29连接的对不对,现象都是一样的,都可以正常上电,当前根本复现不了板卡上芯片的现象。谢谢

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YiZ_31
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您这个板卡,在没修改配置之前,枚举出来是什么配置?

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Robin_Peng
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您好,

我跟客户沟通了下,客户没太注意,只是后来直接改成默认配置了。

谢谢

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Robin_Peng
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您好,

目前,我评估板上用的是 vbus POWER 模式, 客户板子用的是self power,若是使用vbus POWER 模式

下的配置文件,烧录到客户的板子上,就会导致无法识别65215吗?谢谢

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YiZ_31
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我测试了一下,这个确实配置选错了还是能枚举出来的

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Robin_Peng
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您好,

目前客户这里无法识别65215,下一步怎么做呢,谢谢

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YiZ_31
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这是不是之前那个在linux上烧固件的客户?

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Robin_Peng
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您好,

是的,就是那个客户,开始使用65211测试通过了,之后换成用65215进行测试,给客户提供了评估版进行测试。现在出现了这个问题。谢谢

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YiZ_31
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请客户想办法把板子上的片子换一下吧

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Robin_Peng
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您好,

换个片子后,还是烧录评估板上测试的那个配置文件吗?谢谢

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YiZ_31
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这个配置文件是根据实际情况决定的,该选什么就选什么。如果还是有问题那客户要检查下PCB了。

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Robin_Peng
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好的,谢谢,客户把芯片的usb接口给整出来了,然后通过window下载配置,可以正常工作了,只是不知道那个配置引起的。请问下是否可以模拟Smbus时序,谢谢

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YiZ_31
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我们这个就是标准的I2C接口,没有特殊的时序要求

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Robin_Peng
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Hi YiZ_31,

非常感谢您的支持,

Thanks

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