2304867_en-US

nt3h2111 cannot be accessed via IIC

I encountered an issue while using the NT3H2111 chip. When issue occur, IIC read/write operations always get NAK result , yet NFC read/write operations on the EEPROM function normally.

I attempted to scan all IIC addresses but did not receive any valid ACKs.

After this situation occurred, I had to replace the IC with a new one. Is there a way to check?

Re: nt3h2111 cannot be accessed via IIC

Hello KaiLi

Yes, replacing the chip will fix communication issue.

When the issue occurred, I used a logic analyzer to capture the actual waveforms of SDA and SCL. I found the IIC waveforms were normal, but there was no ACK when writing to the component address. I performed an I²C address scan, and all addresses returned NAK.

Re: nt3h2111 cannot be accessed via IIC

Hello @Jerry_zeng22

So, I'd like to ask if replacing the chip will fix the communication issue?

Also, could you use a logic analyzer to monitor the data on the I2C lines, like SDA and SCL?