Cannot addressing for multiple SC16IS750 UART-I2C bridge

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Cannot addressing for multiple SC16IS750 UART-I2C bridge

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hieunguyenbn
Contributor I

Hello everyone,

I am using some SC16IS750 via I2C protocol. The SC16IS750 is addressed by using A1 and A0 pins as shown below. However, I can only use 4 cases (VDD-VDD, VDD-VSS, VSS-VDD, VSS-VSS). When one of the SC16IS750 that has A1 or A0 pin connected to SCL/SDA, then it cannot detect that address and also affact other SC16IS750.

So, how to fix this problem ? 

Thank you for you consideration !

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guoweisun
NXP TechSupport
NXP TechSupport

Hi

Please try that address lines were connected through 10 resistor to the SDA/SCL.

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