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DP83848-HT датащи(PDF) 14 Page - Texas Instruments

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номер детали DP83848-HT
подробное описание детали  DP83848-HT PHYTER™ Military Temperature Single Port 10/100 MB/S Ethernet Physical Layer Transceiver
PDF  81 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

DP83848-HT датащи(HTML) 14 Page - Texas Instruments

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RX_CLK
RXD[3:0]
RX_DV
Valid data
T2.12.2
T2.12.3
T2.12.1
T2.12.1
TX_CLK
TXD[3:0]
TX_EN
Valid data
T2.11.1
T2.11.1
T2.11.2
T211.3
DP83848-HT
SLLSEJ7 – FEBRUARY 2015
www.ti.com
Table 11. 10 Mb/s MII Transmit Timing
PARAMETER
NOTES(1)
MIN
TYP
MAX
UNIT
T2.11.1
TX_CLK high/low time
10 Mb/s MII mode
160
200
240
ns
T2.11.2
TXD[3:0], TX_EN data setup to TX_CLK
10 Mb/s MII mode
24.70
ns
fall
T2.11.3
TXD[3:0], TX_EN data hold from TX_CLK
10 Mb/s MII mode
0
ns
rise
(1)
An attached Mac should drive the transmit signals using the positive edge of TX_CLK. As shown above, the MII signals are sampled on
the falling edge of TX_CLK.
Figure 11. 10 Mb/s MII Transmit Timing
Table 12. 10 Mb/s MII Receive Timing
PARAMETER
NOTES(1)
MIN
TYP
MAX
UNIT
T2.12.1
RX_CLK high/low time
130
200
240
ns
T2.12.2
RX_CLK to RXD[3:0], RX_DV delay
10 Mb/s MII mode
100
ns
T2.12.3
RX_CLK rising edge delay from RXD[3:0],
10 Mb/s MII mode
245
ns
RX_DV valid
(1)
RX_CLK may be held low for a longer period of time during transition between reference and recovered clocks. Minimum high and low
times will not be violated.
Figure 12. 10 Mb/s MII Receive Timing
14
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