Motorola MCF5281 ユーザーズマニュアル
MOTOROLA
Chapter 33. Electrical Characteristics
33-23
Fast Ethernet AC Timing Specifications
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.
Figure 33-13. MII Serial Management Channel Timing Diagram
Table 33-20. MII Serial Management Channel Timing
Num
Characteristic
Min
Max
Unit
M10
EMDC falling edge to EMDIO output invalid (minimum propagation
delay)
delay)
0
—
ns
M11
EMDC falling edge to EMDIO output valid (max prop delay)
—
25
ns
M12
EMDIO (input) to EMDC rising edge setup
10
—
ns
M13
EMDIO (input) to EMDC rising edge hold
0
—
ns
M14
EMDC pulse width high
40% 60% MDC period
M15
EMDC pulse width low
40% 60% MDC period
M11
EMDC (output)
EMDIO (output)
M12
M13
EMDIO (input)
M10
M14
M15