[CYBT-213043-02] Maximum input voltage of GPIO

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KeTa_1341526
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Hello,

What is the absolute maximum rated input voltage for GPIO of CYBT-213043-02?
The datasheet has a description of the GPIO threshold, but I don't know the maximum value.

Please let me know when VDD is 3.3V and 1.8V.

KeTa_1341526_0-1679040783473.png

Thanks

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Hi Keta,

 

 

Understood. VDDO should not be more than VBAT, on the safe side. Could you please keep the same voltage with VBAT?

Even so, 1.8V should not be more than 2.1V as VGPIO_ABS.

 

BR

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Sven_Wang
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Hi @KeTa_1341526 

 

This module uses the CYW20819A1

https://www.infineon.com/dgdl/Infineon-CYW20819-DataSheet-v08_00-EN.pdf?fileId=8ac78c8c82ce56640182f...

 

It should not be more than the VDDO, on page 31, VDDO was not more than 3.45V.

So the GPIO input VDD should not be more than 3.45V.

 

Thanks

Sven

 

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KeTa_1341526
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Hi Sven,

 

Thank you for your reply.

Let me confirm two things.

Q1. When VDD=3.3V, is it correct that the maximum input voltage of GPIO should not exceed 3.45V?

Q2.What is the voltage when VDD=1.8V?

 

Thanks

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Hi @KeTa_1341526 

 

Both Q1 & Q2 should not be more than 3.45V.

 

Thanks

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KeTa_1341526
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Hi Sven_Wang,

 

Let me confirm Q2 again.

Module VDD is connected to VDDO1 and VDDO2, etc.

KeTa_1341526_0-1679280076023.png

 

If 1.8V is supplied to the VDD of this Module, I am worried that the IO will be broken if a voltage of 3.45V is applied to the input terminal such as GPIO.

IO corruption doesn't happen?

 

Thanks

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Hi

 

The 3.45V is a max Voltage. Even if it's higher a little than it, it will not be damaged but may shorten the chip's lifespan.

In normally using, it's not a good idea to use the 3.45V for 1.8V even if it not be damaged immediately.

 

Thanks

Sven

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KeTa_1341526
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Hi Sven,

 

>In normally using, it's not a good idea to use the 3.45V for 1.8V even if it not be damaged immediately.

If GPIO can be broken, please tell me the guaranteed input voltage when VDD=1.8V.
For example, below is a datasheet for a PSoC based Module, but with [VGPIO_ABS] defined as VDD+0.5V.

KeTa_1341526_0-1679286105735.png

 

Please tell me the same definition for CYBT-213043-02/CYW20819.

 

Thanks

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Hi Keta,

 

 

Understood. VDDO should not be more than VBAT, on the safe side. Could you please keep the same voltage with VBAT?

Even so, 1.8V should not be more than 2.1V as VGPIO_ABS.

 

BR

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KeTa_1341526
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Hi Sven,

This is a confirmation just in case.

 

Where is "VDDO should not be more than VBAT, on the safe side. ould you please keep the same voltage with VBAT?" written?

Also, VGPIO_ABS for PSoC-based BLE Module is "VDD+0.5V".

Is VGPIO_ABS for CYW20819 based Module "VDD(1.8V)+0.3V=2.1V"?

I want to check the VGPIO_ABS of CYW20819 based Module is lower than that of PSoC based BLE Module.

 

Thanks

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Hi Keta

 

"should not be more than VBAT" is follow the GPIO for ADC.

 

Is VGPIO_ABS for CYW20819 based Module "VDD(1.8V)+0.3V=2.1V"?

Yes

 

BR

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