KSZ8091RNA Datasheet, PDF (50/62 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

KSZ8091RNA/RND
7.3 MDC/MDIO Timing
FIGURE 7-4:
MDC/MDIO TIMING
t_P
MDC
MDIO
(PHY INPUT)
MDIO
(PHY OUTPUT)
t_MD1
t_MD2
VALID
DATA
t_MD3
VALID
DATA
VALID
DATA
TABLE 7-4: MDC/MDIO TIMING PARAMETERS
Parameter
Description
Min. Typ. Max. Units
f_c
t_P
t_MD1
t_MD2
t_MD3
MDC Clock Frequency
—
2.5
10 MHz
MDC period
—
400
—
ns
MDIO (PHY input) setup to rising edge of MDC
10
—
—
ns
MDIO (PHY input) hold from rising edge of MDC
4
—
—
ns
MDIO (PHY output) delay from rising edge of MDC 5
222
—
ns
DS00002298A-page 50
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