Hi,
I have a question about DP83822.
My customer are connecting DP83822 to AM335x EMAC(100Base) via MII interface.
The clock output of TX_CLK and RX_CLK from DP83822 seems 25MHz sine wave(not pulse).
And its transition time doesn't meet the AM335x EMAC MII mode timing requirement.
(TX_CLK and RX_CLK of DP83822 are directly connected to AM335x appropriate pins.)
AM335x MII mode requires Max 3[ns] for Tr(rising) and Tf(falling)
but the sine wave transition time are 6ns(Tr) and 7ns(Tf) between 0.8V-2.0V.
The input clock to DP83822 XI pin is 25MHz oscillator and
its transition timing specification is Max 2[ns].
I have following question:
Does DP83822 typically output sine wave from TX_CLK and RX_CLK?
If not, what should I check? Please give me an advice.
best regards,
g.f.
