Mii Serial Management Channel Timing Diagram; Mii Serial Management Channel Timing - Motorola ColdFire MCF5281 User Manual

33.12.4 MII Serial Management Channel Timing

(EMDIO and EMDC)
The FEC functions correctly with a maximum MDC frequency of 2.5 MHz.
Table 33-20 lists MII serial management channel timings.
Table 33-20. MII Serial Management Channel Timing
Num
M10 EMDC falling edge to EMDIO output invalid (minimum propagation
delay)
M11 EMDC falling edge to EMDIO output valid (max prop delay)
M12 EMDIO (input) to EMDC rising edge setup
M13 EMDIO (input) to EMDC rising edge hold
M14 EMDC pulse width high
M15 EMDC pulse width low
Figure 33-13 shows MII serial management channel timings listed in Table 33-20.
EMDC (output)
EMDIO (output)
EMDIO (input)
Figure 33-13. MII Serial Management Channel Timing Diagram
MOTOROLA
Characteristic
M14
M12
M13
Chapter 33. Electrical Characteristics
Fast Ethernet AC Timing Specifications
Min Max
0 —
— 25
10 —
0 —
40% 60% MDC period
40% 60% MDC period
M15
M10
M11
Unit
ns
ns
ns
ns
33-23