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MSC7116_08 Datasheet, PDF (30/60 Pages) Freescale Semiconductor, Inc – Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC | |||
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Electrical Characteristics
2.5.6.2 Transmit Signal Timing
Table 22. Transmit Signal Timing
No.
Characteristics
800 Transmit clock period:
⢠MII: TXCLK
⢠RMII: REFCLK
801 Transmit clock pulse width highâas a percent of clock period
⢠MII: RXCLK
⢠RMII: REFCLK
802 Transmit clock pulse width lowâas a percent of clock period:
⢠MII: RXCLK
⢠RMII: REFCLK
805 Transmit clock to TXDn, TX_EN, TX_ER invalid
806 Transmit clock to TXDn, TX_EN, TX_ER valid
800
801
802
Transmit
clock
TXDn
TX_EN
TX_ER
806
805
Valid
Figure 11. Ethernet Receive Signal Timing
2.5.6.3 Asynchronous Input Signal Timing
Table 23. Asynchronous Input Signal Timing
No.
Characteristics
807 ⢠MII: CRS and COL minimum pulse width (1.5 à TXCLK period)
⢠RMII: CRS_DV minimum pulse width (1.5 x REFCLK period)
CRS
COL
CRS_DV
807
Figure 12. Asynchronous Input Signal Timing
Min Max Unit
40
â
ns
20
â
ns
35
65
%
14
â
ns
7
â
ns
35
65
%
14
â
ns
7
â
ns
4
â
ns
â
14
ns
Min Max Unit
60
â
ns
30
â
ns
MSC7116 Data Sheet, Rev. 13
30
Freescale Semiconductor
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