DP83825I: Pin assignment for LED2 (speed status) in master mode

dai_sakamoto

Intellectual 310 points

Part Number: DP83825I
Other Parts Discussed in Thread: DP83825EVM

Tool/software:

In master mode, pin 2 is used for CLKOUT, so can not LED2 be used?

Also, for the master mode connection, should I just connect the CLKOUT (50MHz out) pin to the MAC's refclk pin?

4 days ago

+1 David (ASIC) Liu 3 days ago

TI__Guru**** 176281 points

Hi,

Your understanding is correct. In RMII master mode, pin 2 is 50MHzOut to keep the PHY and the MAC synchronized, and 50MHzOut has to be connected to the MAC Ref Clk input.

Thanks
David

0 dai_sakamoto 3 days ago in reply to David (ASIC) Liu

Intellectual 310 points

Thank you for your reply. Am I correct in understanding that LED2 cannot be used in master mode? LED2 is connected on the evaluation board, but is it intended to be used in slave mode?

DP83825EVM master mode(default)