diff --git a/configs/freedom-k64f/README.txt b/configs/freedom-k64f/README.txt
index 9ef9660763c..87519c37fae 100644
--- a/configs/freedom-k64f/README.txt
+++ b/configs/freedom-k64f/README.txt
@@ -10,6 +10,7 @@ Contents
   o Freedom K64F Features
   o Serial Console
   o LEDs and Buttons
+  o Ethernet
   o Development Environment
   o GNU Toolchain Options
 
@@ -125,6 +126,40 @@ LEDs and Buttons
   SW2       PTC6/SPI0_SOUT/PD0_EXTRG/I2S0_RX_BCLK/FB_AD9/I2S0_MCLK/LLWU_P10
   SW3       PTA4/FTM0_CH1/NMI_b/LLWU_P3
 
+Ethernet
+========
+
+  ------------ ----------------- --------------------------------------------
+  KSZ8081      Board Signal(s)   K64F Pin
+  Pin Signal                     Function
+  --- -------- ----------------- --------------------------------------------
+   1  VDD_1V2  VDDPLL_1.2V       ---
+   2  VDDA_3V3 VDDA_ENET         ---
+   3  RXM      ENET1_RX-         ---
+   4  RXP      ENET1_RX+         ---
+   5  TXM      ENET1_TX-         ---
+   6  TXP      ENET1_TX+         ---
+   7  X0       RMII_XTAL0        ---
+   8  XI       RMII_XTAL1        ---
+   9  REXT     ---               ---, Apparently not connected
+  10  MDIO     RMII0_MDIO        PTB0/RMII0_MDIO
+  11  MDC      RMII0_MDC         PTB1/RMII0_MDC
+  12  RXD1     RMII0_RXD_1       PTA12/RMII0_RXD1
+  13  RXD0     RMII0_RXD_0       PTA13/RMII0_RXD0
+  14  VDDIO    VDDIO_ENET        ---
+  15  CRS_DIV                    PTA14/RMII0_CRS_DV
+  16  REF_CLK  RMII_RXCLK        PTA18/EXTAL0, PHY clock input
+  17  RXER     RMII0_RXER        PTA5/RMII0_RXER
+  18  INTRP    RMII0_INT_B,      J14 Pin 2, Apparently not available unless jumpered
+               PHY_INT_1
+  19  TXEN     RMII0_TXEN        PTA15/RMII0_TXEN
+  20  TXD0     RMII0_TXD_0       PTA16/RMII0_TXD0
+  21  TXD1     RMII0_TXD_1       PTA17/RMII0_TXD1
+  22  GND1     ---               ---
+  24  nRST     PHY_RST_B         ---
+  25  GND2     ---               ---
+  --- -------- ----------------- --------------------------------------------
+
 Development Environment
 =======================