NUCLEO-H503RB‘ I3C don't produce ack, when read data from I2C devices.

Hi,

Our company need to make a I3C demo, so i'm studing I3C protocol with NUCLEO-H503RB and a generic IIC device.

We know, I3C bus is compatible with IIC device.

I meet a problem.

when I2C master read 4 byte data from IIC device’ reg 0x10, IIC master produce ACK normally.

when I3C master read 4 byte data from IIC device’ reg 0x10, I3C master don't produce ACK.

Why? How to fix the problem.

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