The problem is solved. It was in the software. 0xCC is valid address and works fine.
In the master mode device can't send data to address which is same than SSPADD. Software is quite special because ...
Actually master and slave is same device and it works in two modes.
I cheked singals on scope and they looked fine. Pull ups are changeable (1k,2k2 and 10k). Slave has 1k and master has 10k pull up ...
I've a problem with i2c slave device which use 0xCC address. My master/slave system works fine if I use other than 0xCC address in slave device!?!
The slave keeps SDA-line low after ack-bit if master ...