CCG3PA IO和I2C电平

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GrWa_2302706
Level 4
Level 4
50 questions asked 25 replies posted 10 replies posted

Hi

我在CCG3PA datasheet上看到LVTTL input, VDDD<2.7V,是不是说CCG3PA IO/I2C可以是1.8V电平的?

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如果是的话,此时芯片供电来自于VBUS_IN ? VDDD供1.8V吗?

BR

Grace

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1 解答
YiZ_31
Moderator
Moderator
Moderator
1000 replies posted 750 replies posted 500 replies posted

Hi,

我测了一下,可以支持。

Regards,
Eddie

在原帖中查看解决方案

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5 回复数
YiZ_31
Moderator
Moderator
Moderator
1000 replies posted 750 replies posted 500 replies posted

Hi Grace,

VDDD不可以供1.8V, 我要去向datasheet的作者确认一下。

Regards,
Eddie

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Flance_Fang
Level 4
Level 4
Distributor - Weikeng(GC)
50 sign-ins 50 questions asked 25 sign-ins

Hi.EDDIE

手机客户的问题其实很简单,他们就是想用3171(从)的I2C来跟他的CPU通讯(主),不过他们的CPU是1.8V工作的,他们又不想额外增加level shift 电路来实现,不过我在PSOC creator的环境下当选择show EZI2C和对GPIO口用双向话,是可以兼容1.8V,不知道是否3171也有该功能呢?不知道在3171这块能否启动该功能呢?

微信图片_20200427151923.png微信图片_20200427151932.png微信图片_20200427151940.png微信图片_20200427151949.png

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YiZ_31
Moderator
Moderator
Moderator
1000 replies posted 750 replies posted 500 replies posted

Hi,

我测了一下,可以支持。

Regards,
Eddie

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GrWa_2302706
Level 4
Level 4
50 questions asked 25 replies posted 10 replies posted

Hi Eddie

你测试的工程可否发给我测试一下?谢谢。

BR

Grace

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YiZ_31
Moderator
Moderator
Moderator
1000 replies posted 750 replies posted 500 replies posted

Hi Grace,

我用MiniProg测的CY4532, 可以读写

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