Microcontroller User's Manual

33-22 MCF5282 User’s Manual MOTOROLA
Fast Ethernet AC Timing Specifications
Table 33-18 lists MII transmit channel timings.
Figure 33-11 shows MII transmit signal timings listed in Table 33-18.
Figure 33-11. MII Transmit Signal Timing Diagram
33.12.3 MII Async Inputs Signal Timing (ECRS and ECOL)
Table 33-19 lists MII asynchronous inputs signal timing.
Figure 33-12 shows MII asynchronous input timings listed in Table 33-19.
Figure 33-12. MII Async Inputs Timing Diagram
Table 33-18. MII Transmit Signal Timing
Num Characteristic
1
1
ETXCLK, ETXD0, and ETXEN have the same timing in 10 Mbit 7-wire interface mode.
Min Max Unit
M5 ETXCLK to ETXD[3:0], ETXEN, ETXER invalid 5 — ns
M6 ETXCLK to ETXD[3:0], ETXEN, ETXER valid — 25 ns
M7 ETXCLK pulse width high 35% 65% ETXCLK period
M8 ETXCLK pulse width low 35% 65% ETXCLK period
Table 33-19. MII Async Inputs Signal Timing
Num Characteristic Min Max Unit
M9
1
1
ECOL has the same timing in 10 Mbit 7-wire interface mode.
ECRS, ECOL minimum pulse width 1.5 — ETXCLK period
M6
ETXCLK (input)
ETXD[3:0] (outputs)
ETXEN
ETXER
M5
M7
M8
ECRS, ECOL
M9