參數(shù)資料
型號: MPC857T
廠商: Motorola, Inc.
英文描述: Hardware Specifications
中文描述: 硬件規(guī)格
文件頁數(shù): 69/88頁
文件大?。?/td> 1104K
代理商: MPC857T
MOTOROLA
MPC862/857T/857DSL Hardware Specifications
For More Information On This Product,
Go to: www.freescale.com
69
FEC Electrical Characteristics
Figure 71 shows signal timings during UTOPIA receive operations.
Figure 71. UTOPIA Receive Timing
Figure 72 shows signal timings during UTOPIA transmit operations.
Figure 72. UTOPIA Transmit Timing
13
FEC Electrical Characteristics
This section provides the AC electrical specifications for the Fast Ethernet controller (FEC). Note that the
timing specifications for the MII signals are independent of system clock frequency (part speed
designation). Furthermore, MII signals use TTL signal levels compatible with devices operating at either
5.0 or 3.3 V.
UtpClk
UTPB
SOC
RxEnb
U1
RxClav
PHREQn
U3
HighZ at MPHY
HighZ at MPHY
U1
U5
4
4
3
2
UtpClk
UTPB
SOC
TxEnb
TxClav
PHSELn
HighZ at MPHY
HighZ at MPHY
1
U1
5
5
2
3
4
F
Freescale Semiconductor, Inc.
n
.
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