Freescale Semiconductor MPC8313E PowerQUICC II Pro Family Reference Manual page 918

Enhanced Three-Speed Ethernet Controllers
15.7.1.3 RMII Interface Mode
Table 15-171 shows the signals configurations required for RMII interface mode.
Signals
GTX_CLK
TX_CLK
TxD[0]
TxD[1]
TxD[2]
TxD[3]
TX_EN
TX_ER
RX_CLK
RxD[0]
RxD[1]
RxD[2]
RxD[3]
RX_DV
RX_ER
Table 15-172 describes the shared signals for the RMII interface.
eTSEC Signals
MDIO
MDC
TX_CLK
Sum
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
15-200
Table 15-171. RMII Interface Mode Signal Configuration
eTSEC Signals
No. of
I/O
Signals
O
I
O
O
O
O
O
O
I
I
I
I
I
I
I
COL I
CRS I
Sum
Table 15-172. Shared RMII Signals
No. of
I/O GMII Signals
Signals
I/O 1 MDIO
O 1 MDC
I 1 REF_CLK
3
RMII Interface
Frequency [MHz] 50
Voltage [V] 3.3
Signals
1 leave unconnected
1 REF_CLK
1 TxD[0]
1 TxD[1]
1 leave unconnected
1 leave unconnected
1 TX_EN
1 leave unconnected
1 leave unconnected
1 RxD[0]
1 RxD[1]
1
1
1 CRS_DV
1 RX_ER
1
1
17
Sum
No. of
I/O
Signals
I/O 1
O 1
I 1
Sum 3
No. of
I/O
Signals
I 1
O 1
O 1
O 1
I 1
I 1
not used
not used
I 1
I 1
not used
not used
8
Function
Management interface I/O
Management interface clock
Reference clock
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