TX FIFO Overflow

During Store Forward mode, you need to configure the TXFIFO_DEPTH value to store the TX_AXI_TDATA. In the event of a TX FIFO overflow, where TXFIFO_DEPTH is insufficient to store the entire frame with maximum frame size, the entire frame is scrapped. The XGMII TX outputs an IDLE frame in replacement of the scrapped transfer. Figure 1 shows the TX FIFO overflow condition, together with the corresponding statistic reporting.