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[FAQ] [参考译文] [常见问题解答] PMBus 主器件是否需要时钟拉伸? UCD90xxx

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Other Parts Discussed in Thread: UCD90120A, UCD9090, UCD90160A, UCD90160, UCD90320U, UCD90120, UCD9090A, UCD90124, UCD90124A, UCD90320
请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。如需获取准确内容,请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1049387/faq-is-clock-stretching-required-by-the-pmbus-master-ucd90xxx

主题中讨论的其他器件:UCD90120AUCD9090UCD90160AUCD90160UCD90320UUCD90120UCD9090AUCD90124UCD90124AUCD90320

是的。 UCD90xxx 器件可在处理 PMBus 查询时保持时钟低电平。 根据 PMBus 规范、主机需要支持长达35ms 的时钟拉伸。 建议在两次 PMBus 查询之间留出1ms 的间隔;否则、UCD90xxx 可能偶尔将时钟保持在低电平35ms、然后超时(硬件释放时钟线)。

有关更多常见问题解答、请查看以下文档。

UCD90xxx 系列常见问题解答 

UCD9090 UCD9090A UCD90120 UCD90120A UCD90124 UCD90124A UCD90160 UCD90160A UCD90320 UCD90320U