Under the fixed 10Mbps mode of stm32f407 Ethernet, the current will be cut off for several minutes？

[zhuij.1]

Under the fixed 10Mbps mode of stm32f407 Ethernet（inner MAC+external PHY）, the net flow will be cut off for several minutes，but under fixed 100M or ETH_AUTONEGOTIATION_ENABLE ,the net flow is normal，is 10Mbps unavailable？

[Piranha]

Check the values of ***_PHY_ADDRESS, PHY_SR, PHY_SPEED_STATUS, PHY_DUPLEX_STATUS defines.