Datasheet

MCF5208 ColdFire
®
Microprocessor Data Sheet, Rev. 3
Electrical Characteristics
Freescale Semiconductor38
5.12.4 MII Serial Management Channel Timing (FEC_MDIO and
FEC_MDC)
Table 21 lists MII serial management channel timings. The FEC functions correctly with a maximum
MDC frequency of 2.5 MHz.
Figure 26 shows MII serial management channel timings listed in Table 21.
Figure 26. MII Serial Management Channel Timing Diagram
Table 21. MII Serial Management Channel Timing
Num Characteristic Min Max Unit
M10 FEC_MDC falling edge to FEC_MDIO output invalid (minimum
propagation delay)
0— ns
M11 FEC_MDC falling edge to FEC_MDIO output valid (max prop delay) — 25 ns
M12 FEC_MDIO (input) to FEC_MDC rising edge setup 10 — ns
M13 FEC_MDIO (input) to FEC_MDC rising edge hold 0 — ns
M14 FEC_MDC pulse width high 40% 60% FEC_MDC period
M15 FEC_MDC pulse width low 40% 60% FEC_MDC period
M11
FEC_MDC (output)
FEC_MDIO (output)
M12 M13
FEC_MDIO (input)
M10
M14
M15