Datasheet

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MRCLK
2 3
1
4
4
TMS320C6472
www.ti.com
SPRS612GJUNE 2009 REVISED JULY 2011
7.15.4 EMAC Electrical Data/Timing (MII, GMII, RMII, RGMII, and SSMII)
7.15.4.1 EMAC MII and GMII Electrical Data/Timing
Table 7-109. Timing Requirements for MRCLK - MII and GMII Operation
(see Figure 7-48)
500/625/700
NO. 1000 Mbps 100 Mbps 10 Mbps UNIT
MIN MAX MIN MAX MIN MAX
1 t
c(MRCLK)
Cycle time, MRCLK 8 40 400 ns
2 t
w(MRCLKH)
Pulse duration, MRCLK high 2.8 14 140 ns
3 t
w(MRCLKL)
Pulse duration, MRCLK low 2.8 14 140 ns
4 t
t(MRCLK)
Transition time, MRCLK 1 3 3 ns
Figure 7-48. MRCLK Timing
Table 7-110. Switching Characteristics Over Recommended Operating Conditions for MTCLK -
MII Operation
(see Figure 7-49)
500/625/700
NO. 100 Mbps 10 Mbps UNIT
MIN MAX MIN MAX
1 t
c(MTCLK)
Cycle time, MTCLK 40 400 ns
2 t
w(MTCLKH)
Pulse duration, MTCLK high 14 140 ns
3 t
w(MTCLKL)
Pulse duration, MTCLK low 14 140 ns
4 t
t(MTCLK)
Transition time, MTCLK 3 3 ns
Table 7-111. Switching Characteristics Over Recommended Operating Conditions for GMTCLK -
GMII Operation
(see Figure 7-49)
500/625/700
NO. 1000 Mbps UNIT
MIN MAX
1 t
c(GMTCLK)
Cycle time, GMTCLK 8 ns
2 t
w(GMTCLKH)
Pulse duration, GMTCLK high 2.8 ns
3 t
w(GMTCLKL)
Pulse duration, GMTCLK low 2.8 ns
4 t
t(GMTCLK)
Transition time, GMTCLK 1 ns
Copyright © 20092011, Texas Instruments Incorporated C64x+ Peripheral Information and Electrical Specifications 227
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