Normal Frame Reception with Extension Field - 3.5 English

In accordance with the IEEE 802.3-2008 Specification [Ref 2] , clause 36, state machines for the 1000BASE-X PCS, gmii_rx_er_chx can be driven High following reception of the end frame in conjunction with gmii_rxd_chx[7:0] containing the hexadecimal value of 0x0F to signal carrier extension. This is illustrated in This Figure .

This is not an error condition and can occur even for full-duplex frames.

Figure 4-4: GMII Normal Frame Reception wIth Carrier Extension

X-Ref Target - Figure 4-4