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Starterware/TCA6416: TCA6416 Acknowledge failure

Part Number: TCA6416

Tool/software: Starterware

I am trying to appeal to TCA6416, but the problem is that it does not respond to ASK.
I check the whole l2c bus in cycle and TCA6416 is the only thing that is not seen there.
I also have TCA6416 and i have the same problem with it.

Here's a sample code:

uint8 i2cWriteBuffer[2] = {0x06, 0x00};
I2C_Transmit(0x20 << 1, (uint8*)i2cWriteBuffer, 2);