phy_rx_er - 3.0 English

AXI Ethernet Lite MAC LogiCORE IP Product Guide (PG135)

Document ID
PG135
Release Date
2021-11-02
Version
3.0 English

The PHY drives the Receive Error signal ( phy_rx_er ) synchronously to phy_rx_clk . The PHY drives phy_rx_er for one or more phy_rx_clk periods to indicate that an error (such as a coding error or any error that the PHY is capable of detecting) was detected somewhere in the frame presently being transferred from the PHY to the AXI Ethernet Lite MAC .

The signal phy_rx_er should have no effect on the AXI Ethernet Lite MAC while phy_dv is deasserted. This Figure shows the behavior of phy_rx_er during frame reception with errors.

Figure 2-4: Receive with Errors

X-Ref Target - Figure 2-4

ds787_22.jpg

Table: Possible Values for phy_dv, phy_rx_er, and phy_rx_data[3:0] shows the possible combinations for the receive signals.

Table 2-6: Possible Values for phy_dv, phy_rx_er, and phy_rx_data[3:0]

phy_dv

phy_rx_er

phy_rx_data[3:0]

Indication

0

0

0000 through 1111

Normal inter-frame

0

1

0000

Normal inter-frame

0

1

0001 through 1101

Reserved

0

1

1110

False carrier indication

0

1

1111

Reserved

1

0

0000 through 1111

Normal data reception

1

1

0000 through 1111

Data reception with errors