Is the gpio_21 corresponding to CTL_4?

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Feitong
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Here is the thing that I 've bought an CYUSB3KIT-003,and I used it in slave fifo mode.  I used FLAGA and set it to gpio_21. 2021-04-15 (2).pngAs I understand it, gpio_21 is connected to the CTL_4 pin of the board so it should be logic 0 after the board is booted, however , its voltage was about 0.9V.

 How is it happen? 

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AliAsgar
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1000 replies posted 250 solutions authored 750 replies posted

Hello,

As FX3 is used in slave mode, PCLK is expected. Check CTL4 with PCLK in place. Let us know if any further queries.

Best Regards,
AliAsgar

 

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AliAsgar
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1000 replies posted 250 solutions authored 750 replies posted

Hello,

Could you check the stability of your PCLK line?

We observed the CTL4 line on our CYUSB explorer kit and got the output as expected. We have attached the pin trace for your reference.

Best Regards,
AliAsgar

 

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Feitong
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Hi,

When I was measuring the vlotage of the CTL4, the PCLK is not connected. So it does matter, right? The CTL4 will get weird if there is no PCLK input?

Thanks so much.

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AliAsgar
Moderator
Moderator
Moderator
1000 replies posted 250 solutions authored 750 replies posted

Hello,

As FX3 is used in slave mode, PCLK is expected. Check CTL4 with PCLK in place. Let us know if any further queries.

Best Regards,
AliAsgar

 

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Hi AliAsgar,

The FX3 works fine after I attached PCLK to it!

Thanks so much!

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