TLK3114SA_13 Datasheet, PDF (63/66 Pages) Texas Instruments – 10-Gbps XAUI Transceiver

4.11 MDIO Timing Requirements
These characteristics are over recommended operating conditions unless otherwise noted.
tperiod
tsu
th
PARAMETER
MDC period
MDIO setup to ↑ MDC
MDIO hold to ↑ MDC
TEST CONDITION
See Figure 4−7
See Figure 4−7
See Figure 4−7
MIN TYP MAX UNIT
50 400
ns
10
ns
10
ns
MDC
tp
tsu
th
MDIO
Figure 4−7. MDIO Read/Write Timing
TXP
50 Ω
RXP
Transmission Line
VDDA
50 Ω
4.2 kΩ
+
_
50 Ω 6.3 kΩ
50 Ω
GND
TXN
Transmission Line
RXN
Transmitter
Media
Receiver
Figure 4−8. High-Speed I/O Direct-Coupled Mode
TXP
50 Ω
RXP
Transmission Line
VDDA
50 Ω
4.2 kΩ
+
_
50 Ω 6.3 kΩ
50 Ω
GND
TXN
Transmission Line
RXN
Transmitter
Media
Receiver
Figure 4−9. Example High-Speed I/O AC-Coupled Mode
4−6