DP83825I: DP83825I LED indication of LED2

Hi Jimmy,

The following registers can be used to configure LED_2 to indicate the speed of the established link:

0x0305=0x0001 //configure LED_2 pin

0x0460=0x0555 //configure LED_2 to indicate Speed (0x0555 = Speed, High for 100BASE-TX 0x0565 = Speed, High for 10BASE-T)

0x0469=0x0000 //toggle LED_2 from active high to active low if needed (bit 6 is the bit I am setting in the register)

Regards,

Justin 

Hi Expert,

Thanks for your info here. One more question, how to configure DP83825I work in 100M mode? They find that DP83825I can work in 10M mode. However, it can not work in 100M mode with 0x0000 REG as 0x0021 and 0x0010 REG is 0x2C04. 

Do you have example script for DP83825 woking in 100MHz and LED0/LED1 woking? 

Thanks!

Hi Jimmy,

Do you want to configure the DP83825 to work with 100M speeds through auto-negotiation or force the device into 100M speed?

Auto-negotiation can be enabled through 0x0000=0x1100

100M Speed can be forced by 0x0000=0x2100

Regards,
Justin 

Hi Justin,

Thanks for your info. Customer find that they can not make it linked to 100MHz mode. For EVM set-up, they only connect RJ45 and USB port. And they keep RMII unconnected. From your viewpoint, it it OK for set-up like this? Thanks!

Jimmy

Hi Jimmy,

Yes, that is a valid setup to establish link over the MDI. Can you describe what the link partner is and what mode it's operating in?

Regards,
Justin 

Hi Justin,

I just want to confirm with yout that leaving RMII unconnected is correct set-up for 100MHz evaluation. Link parter is a machine woking in 10MHz/100MHz auto-negotiation mode. 

At the same time, can you share standard script for DP83825I evaluation? Thanks!

Jimmy