DM385, DM388
SPRS821D –MARCH 2013–REVISED DECEMBER 2013
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Table 8-18. Switching Characteristics Over Recommended Operating Conditions for EMAC RMII Transmit
10/100 Mbits/s
(see Figure 8-15)
OPP100/OPP120/
Turbo/Nitro
NO.
PARAMETER
UNIT
MIN
MAX
Delay time, EMAC[x]_RMREFCLK high to EMAC[x]_RMTXD[x]
valid
1
2
td(RMREFCLK-RMTXD)
2.4
2.4
13
ns
Delay time, EMAC[x]_RMREFCLK high to EMAC[x]_RMTXEN
valid
tdd(RMREFCLK-RMTXEN)
13
1
RMREFCLK
RMTXD1−RMTXD0,
RMTXEN (Outputs)
Figure 8-15. EMAC Transmit Interface Timing RMII Operation
8.6.2.3 EMAC RGMII Electrical Data/Timing
RGMII mode is not supported for OPP50.
Table 8-19. Timing Requirements for EMAC[x]_RGRXC - RGMII Operation
(see Figure 8-16)
OPP100/OPP120/Turbo/Nitro
NO.
UNIT
MIN
360
36
MAX
440
44
10 Mbps
1
2
3
4
tc(RGRXC)
tw(RGRXCH)
tw(RGRXCL)
tt(RGRXC)
Cycle time, EMAC[x]_RGRXC
100 Mbps
1000 Mbps
10 Mbps
ns
7.2
8.8
0.40*tc(RGRXC) 0.60*tc(RGRXC)
0.40*tc(RGRXC) 0.60*tc(RGRXC)
0.45*tc(RGRXC) 0.55*tc(RGRXC)
0.40*tc(RGRXC) 0.60*tc(RGRXC)
0.40*tc(RGRXC) 0.60*tc(RGRXC)
0.45*tc(RGRXC) 0.55*tc(RGRXC)
0.75
Pulse duration, EMAC[x]_RGRXC high
Pulse duration, EMAC[x]_RGRXC low
Transition time, EMAC[x]_RGRXC
100 Mbps
1000 Mbps
10 Mbps
ns
ns
ns
100 Mbps
1000 Mbps
10 Mbps
100 Mbps
1000 Mbps
0.75
0.75
176
Peripheral Information and Timings
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