HDMP-2689 Datasheet, PDF (13/28 Pages) Agilent(Hewlett-Packard) – Quad 2.125/1.0625 GBd Fibre Channel General Purpose SerDes

MDC
MDIO
T_DELAY
MDC
MDIO
T_SU
T_H
Figure 16. MDIO Timing, Driving and Receiving.
MDC
MDIO
A
B
C
D
A Station drives Isb (least significant bit) of regular address on the MDIO line
B Station releases the MDIO line
C Unit (HDMP-2689) drives a low on the MDIO line
D Unit (HDMP-2689) drives bit 15 of the read register data
Note: All MDIO changes are triggered from the rising edge of MDC.
MDIO Timing, Turn Around (TA) Cycles During a Read.
MDC
MDIO
A
B
A Unit (HDMP-2689) drives Isb (least significant bit) of read register data
B Unit (HDMP-2689) releases the MDIO line
Note: For more information, see the IEEE 802.3 Part 3 22.2.4.5. "Management Frame Structure."
MDIO Timing, Last Bit of Read Register Data, Bus Released by the HDMP-2689.
Figure 17. MDIO Timing Diagrams.
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