SPC58EG80C3 datasheet(97/139 Pages) STMICROELECTRONICS

97 / 139 page

DS11758 Rev 6

97/139

SPC584Gx, SPC58EGx, SPC58NGx

Electrical characteristics

106

4.17.3.4

MII and RMII serial management channel timing (MDIO and MDC)

The Ethernet functions correctly with a maximum MDC frequency of 2.5 MHz.

Figure 36. MII serial management channel timing diagram

4.17.3.5

MII and RMII serial management channel timing (MDIO and MDC)

The Ethernet functions correctly with a maximum MDC frequency of 2.5 MHz.

Note:

In the following table, all timing specifications are referenced from MDC = 1.4 V (TTL levels)

to the valid input and output levels, 0.8 V and 2.0 V (TTL levels). For 5 V operation, timing is

referenced from MDC = 50% to 2.2 V/3.5 V input and output levels.

M11

MDC (output)

MDIO (output)

M12

M13

MDIO (input)

M10

M14

M15

Table 53. MII serial management channel timing

Symbol

Characteristic

Value

Unit

Min

Max

M10

CC D

MDC falling edge to MDIO output invalid

(minimum propagation delay)

0—

M11

CC D

MDC falling edge to MDIO output valid (max

prop delay)

—25

M12

CC D MDIO (input) to MDC rising edge setup

—

M13

CC D MDIO (input) to MDC rising edge hold

—

M14

CC D MDC pulse width high

40%

60%

MDC period

M15

CC D MDC pulse width low

40%

60%

MDC period

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