Micrel, Inc.
KSZ9021RL/RN
MDC/MDIO Timing
tP
MDC
tMD1
tMD2
MDIO
(PHY input)
Valid
Data
Valid
Data
tMD3
MDIO
(PHY output)
Valid
Data
Figure 7. MDC/MDIO Timing
Timing Parameter
Description
Min
Typ
Max
Unit
ns
tP
MDC period
400
t1MD1
tMD2
tMD3
MDIO (PHY input) setup to rising edge of MDC
MDIO (PHY input) hold from rising edge of MDC
MDIO (PHY output) delay from rising edge of MDC
10
10
0
ns
ns
ns
Table 12. MDC/MDIO Timing Parameters
M9999-101309-1.1
October 2009
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