Configuration
—Daughter Cards
MPC5777C EVB User Guide, Rev. 0
27
Freescale
Figure 17:
USB/UART Transceiver Circuit
4.7
Ethernet (FEC) Interface
The signals from the MCU’s Fast Ethernet Controller are terminated to Mother Board interface
connector, J501. Further these signals are connected with Ethernet Physical Interface in the Mother
Board. Also, in order to support Reduced Media-Independent Interface (RMII) mode, the Daughter
Card has the option to connect with an on-board clock oscillator circuit. For MII-Lite mode, the
clock from the Ethernet Physical (PHY) interface on the Mother Board is available.
The FEC Clock Oscillator Circuit & Jumpers in the Daughter card is shown in the
Figure 18.
Figure 18:
FEC Clock Circuit
Jumper settings for the FEC section are detailed in the
Table
15
.
Table 15: FEC Interface Jumper Details
Jumper
Description
Jumper Setting
– MII-Lite
Mode
Jumper Setting
– RMII
Mode
J25
FEC_TXD2 Selection
2-3: Connect with PM4
(TXD2) from Mother Board
1-2: Connect with PM3
(RXER_MDIXEN) from MB.