参数资料
型号: MPC866TVR100A
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 100 MHz, RISC PROCESSOR, PBGA357
封装: LEAD FREE, PLASTIC, BGA-357
文件页数: 72/96页
文件大小: 1303K
代理商: MPC866TVR100A
MPC866/MPC859 Hardware Specifications, Rev. 2
74
Freescale Semiconductor
FEC Electrical Characteristics
Figure 73 shows signal timings during UTOPIA transmit operations.
Figure 73. UTOPIA Transmit Timing
14 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). Also, MII
signals use TTL signal levels compatible with devices operating at either 5.0 or 3.3 V.
14.1 MII Receive Signal Timing (MII_RXD [3:0], MII_RX_DV,
MII_RX_ER, MII_RX_CLK)
The receiver functions correctly up to a MII_RX_CLK maximum frequency of 25 MHz + 1%. There is no minimum
frequency requirement. In addition, the processor clock frequency must exceed the MII_RX_CLK frequency – 1%.
Table 33 shows the timings for MII receive signal.
Figure 74 shows the timings for MII receive signal.
Table 33. MII Receive Signal Timing
Num
Characteristic
Min
Max
Unit
M1
MII_RXD[3:0], MII_RX_DV, MII_RX_ER to MII_RX_CLK setup
5
ns
M2
MII_RX_CLK to MII_RXD[3:0], MII_RX_DV, MII_RX_ER hold
5
ns
M3
MII_RX_CLK pulse width high
35%
65%
MII_RX_CLK period
M4
MII_RX_CLK pulse width low
35%
65%
MII_RX_CLK period
UtpClk
UTPB
TxEnb
1
2
SOC
5
TxClav
PHSELn
3
4
5
HighZ at MPHY
High-Z at MPHY
U1
U2
U3
U4
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