MPC870 FREESCALE [Freescale Semiconductor, Inc], MPC870 Datasheet - Page 70

• Manufacturer Part Number: MPC870
• Description: Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

FEC Electrical Characteristics
15.4 MII Serial Management Channel Timing (MII_MDIO, MII_MDC)
Table 34
with a maximum MDC frequency in excess of 2.5 MHz. The exact upper bound is under investigation.
Figure 67
70
MII_MDIO (input)
MII_MDC (output)
MII_MDIO (output)
Num
M10
M11
M12
M13
M14
M15
provides information on the MII serial management channel signal timing. The FEC functions correctly
shows the MII serial management channel timing diagram.
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
Figure 67. MII Serial Management Channel Timing Diagram
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Table 34. MII Serial Management Channel Timing
MPC875/MPC870 Hardware Specifications, Rev. 3.0
M12
Characteristic
M13
M14
M10
M11
MM15
40%
40%
Min
10
—
0
0
60%
60%
Max
25
—
—
—
Freescale Semiconductor
MII_MDC period
MII_MDC period
Unit
ns
ns
ns
ns