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Opencore i2c issue

Honored Contributor II

I am using opencore IP I2c module in my design. I instantiated 3 I2c modules in my qsys system and assign the address properly. However, I found only one i2c module works well while another 2 don't work. I double checked my design and I didn't see issues. Anyone confronts the similar problem before? 


Thanks very much.
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