100 Mb/s Frame Reception
The operation of the QSGMII core remains unchanged. When operating at a speed of 100 Mb/s, every byte of the MAC frame (from preamble to the frame check sequence field,inclusive) is repeated for 10 clock periods to achieve the desired bit rate. See the following figure for details. It is the responsibility of the client logic, for example an Ethernet MAC, to sample this data correctly.
10 Mb/s Frame Reception
The operation of the core remains unchanged. When operating at a speed of 10 Mb/s, every byte of the MAC frame (from preamble to the frame check sequence field, inclusive) is repeated for 100 clock periods to achieve the desired bit rate. It is the responsibility of the client logic (for example, an Ethernet MAC) to sample this data correctly.