Information

Enhanced Three-Speed Ethernet Controllers
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 1
Freescale Semiconductor 16-123
16.6.1.3 Ethernet Physical Interfaces Signal Summary
Table 16-125 describes the signal multiplexing for MII interfaces.
Table 16-126 describes the signals shared by all interfaces.
Table 16-125. RGMII and MII Signals Multiplexing
RGMII Interface MII Interface
Frequency 125 [MHz] Frequency 25 [MHz]
Voltage 2.5 [V] Voltage 3.3 [V]
Signals
(TSECn_)
I/O No. of Signals
Signals
(TSECn_)
I/O No. of Signals
GTX_CLK O 1 TX_CLK I 1
GTX_CLK125 I 1
TxD[0] O 1 TxD[0] O 1
TxD[1] O 1 TxD[1] O 1
TxD[2] O 1 TxD[2] O 1
TxD[3] O 1 TxD[3] O 1
TX_EN/TX_ER O 1 TX_EN O 1
TX_ER O 1
RX_CLK I 1 RX_CLK I 1
RxD[0] I 1 RxD[0] I 1
RxD[1] I 1 RxD[1] I 1
RxD[2] I 1 RxD[2] I 1
RxD[3] I 1 RxD[3] I 1
RX_DV/RX_ER I 1 RX_DV I 1
RX_ER I 1
COL not used COL I 1
CRS not used CRS I 1
Sum
13
Sum
16
Table 16-126. Shared Signals
Signals I/O No. of Signals Function
MDIO I/O 1 Management interface I/O
MDC O 1 Management interface clock
Sum 2—