参数资料
型号: MPC5200VR400BR2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA272
封装: 27 X 27 MM, 1.27 MM PITCH, ROHS COMPLIANT, PLASTIC, BGA-272
文件页数: 33/72页
文件大小: 978K
代理商: MPC5200VR400BR2
MPC5200B Data Sheet, Rev. 4
Freescale Semiconductor
39
Figure 28. Ethernet Timing Diagram—MII Tx Signal
Figure 29. Ethernet Timing Diagram—MII Async
Table 32. MII Tx Signal Timing
Sym
Description
Min
Max
Unit
SpecID
t5
TX_CLK rising edge to TXD[3:0], TX_EN, TX_ER
invalid
5—
ns
A9.5
t6
TX_CLK rising edge to TXD[3:0], TX_EN, TX_ER valid
25
ns
A9.6
t7
TX_CLK pulse width high
35%
65%
TX_CLK Period(1)
1 The TX_CLK frequency shall be 25% of the nominal transmit frequency, e.g., a PHY operating at 100 Mb/s must provide
a TX_CLK frequency of 25 MHz and a PHY operating at 10 Mb/s must provide a TX_CLK frequency of 2.5 MHz. See
the IEEE 802.3 Specification.
A9.7
t8
TX_CLK pulse width low
35%
65%
TX_CLK Period(1)
A9.8
Table 33. MII Async Signal Timing
Sym
Description
Min
Max
Unit
SpecID
t9
CRS, COL minimum pulse width
1.5
TX_CLK Period
A9.9
t8
t7
t5
TX_CLK (Input)
TXD[3:0] (Outputs)
TX_EN
TX_ER
t6
t9
CRS, COL
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