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MPC852T датащи(PDF) 57 Page - Freescale Semiconductor, Inc

номер детали MPC852T
подробное описание детали  Hardware Specifications
PDF  80 Pages
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производитель  FREESCALE [Freescale Semiconductor, Inc]
домашняя страница  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC852T датащи(HTML) 57 Page - Freescale Semiconductor, Inc

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MPC852T Hardware Specifications, Rev. 3.1
Freescale Semiconductor
57
FEC Electrical Characteristics
Figure 58 shows MII receive signal timing.
Figure 58. MII Receive Signal Timing Diagram
15.2 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 26 provides information about the MII transmit signal timing,.
Figure 59 shows the MII transmit signal timing diagram.
Table 26. 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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