Hello!

For some reasons I need to disable autonegotiation and force Ethernet PHY to 10M Half-Duplex. I am tried to write a value 0 into PHY register 0, but without success. The register value still 0x1100. So the questions:

1) Is it possible to force PHY into specific mode?

2) What I need to do?

3) What is the exact procedure to write into PHY registers (it seems to be different from CH563)?

Self-reply. The correct functions to read and write PHY registers are:

void?write_mii(uint8_t?reg,?uint16_t?data)
{
????R32_ETH_MIWR?=?(data?<<?16)?|?0x0100?|?(reg?&?RB_ETH_MIREGADR_MASK);
????while?(R8_ETH_MISTAT)?{?__DSB();?};
}

uint16_t?read_mii(uint8_t?reg)
{
????R32_ETH_MIWR?=?(reg?&?RB_ETH_MIREGADR_MASK);
????return?R16_ETH_MIRD;
}