Mdio Ac Timing Specification; Mdc High-Speed Operation Timing; Mdc Low-Speed Operation Timing; Datasheet - Intel IXF1104 Datasheet

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Intel IXF1104 4-Port Gigabit Ethernet Media Access Controller
7.6

MDIO AC Timing Specification

The MDIO Interface on the IXF1104 MAC can operate in two modes – low-speed and high-speed.
In low-speed mode, the MDC clock signal operates at a frequency of 2.5 MHz. In high-speed
mode, the MDC clock signal operates at a frequency of 18 MHz. (See
and Table 52.)
7.6.1

MDC High-Speed Operation Timing

Figure 41. MDC High-Speed Operation Timing
MDC
7.6.2

MDC Low-Speed Operation Timing

Figure 42. MDC Low-Speed Operation Timing
MDC
145
24 ns
(3 X 125 MHz clocks)
200 ns
(25 X 125 MHz clocks) (25 X 125 MHz clocks)
400 ns (2.5 MHz)
Figure 41
32 ns
(4 X 125 MHz clocks)
56 ns (17.85 MHz)
200 ns
through Figure 44

Datasheet

Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005