MPC860 Motorola, MPC860 Datasheet - Page 69

• Manufacturer Part Number: MPC860
• Description: Family Hardware Specifications
• Manufacturer: Motorola

13.4 MII Serial Management Channel Timing
Table 13-30 provides information on the MII serial management channel signal timing. The
FEC functions correctly with a maximum MDC frequency in excess of 2.5 MHz. The exact
upper bound is under investigation.
Figure 13-73 shows the MII serial management channel timing diagram.
MOTOROLA
Num
M10
M11
M12
M13
M14
M15
MII_MDIO (Input)
MII_MDC (Output)
MII_MDIO (Output)
MII_MDC falling edge to MII_MDIO output invalid (minimum
propagation delay)
MII_MDC falling edge to MII_MDIO output valid (max prop delay)
MII_MDIO (input) to MII_MDC rising edge setup
MII_MDIO (input) to MII_MDC rising edge hold
MII_MDC pulse width high
MII_MDC pulse width low
(MII_MDIO, MII_MDC)
Figure 13-73. MII Serial Management Channel Timing Diagram
Table 13-30. MII Serial Management Channel Timing
MPC860 Family Hardware Specifications
Characteristic
M12
MII Serial Management Channel Timing (MII_MDIO, MII_MDC)
M13
M14
M10
M11
MM15
40%
40%
Min
10
—
0
0
Max
60%
60%
25
—
—
—
MII_MDC
MII_MDC
period
period
Unit
ns
ns
ns
ns
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