Configuration
—Daughter Cards
MPC5777C EVB User Guide, Rev. 0
39
Freescale
5.6
USB/UART Transceiver
USB to UART transceiver interface provided on the daughter card. USB TYPE B connector interfaced
with FT232RQ, USB to serial UART chip (U502).
The USB to serial UART connection is shown in
Figure 23
.
Figure 23:
USB/UART Transceiver Circuit
5.7
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.
Jumper settings for the FEC section are detailed in the
Table 23.
Table 23: FEC Interface Jumper Details
Jumper
Description
Jumper Setting
– MII-Lite
Mode
Jumper Setting
– RMII
Mode
J26
FEC_TXD2 Selection
2-3: Connect with PM4
(TXD2) from Mother Board
1-2: Connect with PM3
(RXER_MDIXEN) from MB.
J510
FEC Clock Selection
1-2: Connect with Mother
Board
2-3: Connect with On Board
50MHz Oscillator
J524
On Board FEC 50MHz
CLK Enable
1-2: Clock Oscillator in Tri-
state
2-3: Clock Oscillator in
Normal Operation