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1
MTCLK (Input)
MTXD7−MTXD4(GMII only),
MTXD3−MTXD0,
MTXEN (Outputs)
1
GMTCLK (Output)
MTXD7−MTXD0,
MTXEN (Outputs)
TMS320C6454
Fixed-PointDigitalSignalProcessor
SPRS311A–APRIL2006–REVISEDDECEMBER2006
Table7-79.SwitchingCharacteristicsOverRecommendedOperatingConditionsforEMACMIIandGMII
Transmit10/100Mbit/s
(1)
(seeFigure7-63)
-720
-850
-1000
NO.PARAMETERUNIT
100/10Mbps
MINMAX
1t
d(MTCLKH-MTXD)
Delaytime,MTCLKhightotransmitselectedsignalsvalid525ns
(1)ForMII,Transmitselectedsignalsinclude:MTXD[3:0]andMTXEN.ForGMII,Transmitselectedsignalsinclude:GMTXD[7:0]and
MTXEN.
Figure7-63.EMACTransmitInterfaceTiming[MIIandGMIIOperation]
Table7-80.SwitchingCharacteristicsOverRecommendedOperatingConditionsforEMACGMIITransmit
1000Mbit/s
(1)
(seeFigure7-64)
-720
-850
-1000
NO.PARAMETERUNIT
1000Mbps
MINMAX
1t
d(GMTCLKH-MTXD)
Delaytime,GMTCLKhightotransmitselectedsignalsvalid0.55ns
(1)ForGMII,Transmitselectedsignalsinclude:GMTXD[7:0]andMTXEN.
Figure7-64.EMACTransmitInterfaceTiming[GMIIOperation]
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