Hi Sir
We used DP83848J for development and below is the schematic
we found the behavior of LED_Speed is different.
1. after system power-on without connecting cable, the LED_Speed is on.
2.after finishing system bootup, the LED_Speed is off. we measured this pin is High(3.3V)
Based on the spec's description, LED_Speed is off. -> the PHY's status is 10Mb/s
Q1. we measured RX_CLK and TX_CLK, they are 25Mhz. Based on spec's definition, it should be 100Mb/s in 25MHz of TX_CLK/RX_CLK ?
Q2 we had some boards below above procedures, but LED_Speed is on. we measured this pin is 1.375V(low)
below is the register comparison table. the difference is register 0x10
LED_ON
LED_OFF
Please advise
BR
Yimin