MPC852T datasheet(59/80 Pages) FREESCALE

tên linh kiện	MPC852T

Giải thích chi tiết về linh kiện	Hardware Specifications

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MPC852T PowerQUICC™ Hardware Specifications, Rev. 4

Freescale Semiconductor

FEC Electrical Characteristics

15.4

MII Serial Management Channel Timing (MII_MDIO, MII_MDC)

Table 28 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 62 shows the MII serial management channel timing diagram.

Figure 62. MII Serial Management Channel Timing Diagram

Table 28. MII Serial Management Channel Timing

Num

Characteristic

Min

Max

Unit

M10

MII_MDC falling edge to MII_MDIO output invalid (minimum propagation

delay)

0—

M11

MII_MDC falling edge to MII_MDIO output valid (max prop delay)

—

M12

MII_MDIO (input) to MII_MDC rising edge setup

—

M13

MII_MDIO (input) to MII_MDC rising edge hold

—

M14

MII_MDC pulse width high

40%

60%

MII_MDC period

M15

MII_MDC pulse width low

40%

60%

MII_MDC period

M11

MII_MDC (Output)

MII_MDIO (Output)

M12

M13

MII_MDIO (Input)

M10

M14

MM15

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