MPC859T FREESCALE [Freescale Semiconductor, Inc], MPC859T Datasheet - Page 74

• Manufacturer Part Number: MPC859T
• Description: Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

FEC Electrical Characteristics
FEC Electrical Characteristics
14.4
Table 36 shows the timing for the MII serial management channel signal. The FEC functions correctly with
a maximum MDC frequency in excess of 2.5 MHz. The exact upper bound is under investigation.
Figure 77 shows the MII serial management channel timing diagram.
74
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 (maximum
propagation 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 Serial Management Channel Timing (MII_MDIO,
MII_MDC)
Figure 77. MII Serial Management Channel Timing Diagram
Table 36. MII Serial Management Channel Timing
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC866/859 Hardware Specifications
Characteristic
M12
Go to: www.freescale.com
M13
M14
M10
M11
MM15
40%
40%
Min
10
—
0
0
60%
60%
Max
25
—
—
—
MII_MDC period
MII_MDC period
MOTOROLA
Unit
ns
ns
ns
ns