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MPC855T 데이터시트(PDF) 69 Page - Freescale Semiconductor, Inc

부품명 MPC855T
상세설명  Hardware Specifications
PDF  80 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC855T 데이터시트(HTML) 69 Page - Freescale Semiconductor, Inc

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MPC860 Family Hardware Specifications, Rev. 7
Freescale Semiconductor
69
FEC Electrical Characteristics
Figure 71. MII Receive Signal Timing Diagram
13.2 MII Transmit Signal Timing (MII_TXD[3:0], MII_TX_EN,
MII_TX_ER, MII_TX_CLK)
The transmitter functions correctly up to a MII_TX_CLK maximum frequency of 25 MHz +1%. There is no
minimum frequency requirement. In addition, the processor clock frequency must exceed the MII_TX_CLK
frequency – 1%.
Table 30 provides information on the MII transmit signal timing.
Figure 72 shows the MII transmit signal timing diagram.
Table 30. MII Transmit Signal Timing
Num
Characteristic
Min
Max
Unit
M5
MII_TX_CLK to MII_TXD[3:0], MII_TX_EN, MII_TX_ER invalid
5
—
ns
M6
MII_TX_CLK to MII_TXD[3:0], MII_TX_EN, MII_TX_ER valid
—
25
M7
MII_TX_CLK pulse width high
35
65%
MII_TX_CLK
period
M8
MII_TX_CLK pulse width low
35%
65%
MII_TX_CLK
period
M1
M2
MII_RX_CLK (Input)
MII_RXD[3:0] (Inputs)
MII_RX_DV
MII_RX_ER
M3
M4



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