. The GMII interface is a media-independent interface with 24 pins
thatcan be used with various transmission media. Data rates up to 1 Gbit/s are defined. The GMII interface uses an 8-bit interface clocked at 125 MHz.Data is transmitted over eight data lines in each direction. In addition, the GMII interface has six status lines for transmitting error signals and data integrity signals. There is an R version, which stands for Reduced, RGMII
, which uses only four data lines in each direction and has only 12 pins.Ethernet of 10 Mbps and Fast Ethernet of 100 Mbps. The transmitted data format on the GMII interface corresponds to the Ethernet frame.