Messages

1

NXP^TM M522XX, KINETIS and i.MX RT / Re: Teensy 4.1 with Ethernet Kit

« on: December 30, 2020, 07:13:20 AM »

Hey Mark,

Yes, when unpowered, I measure that resistance of 6.49k ohms.
However, when operating, there is 0V on this pin. Although I see 50MHz coming to the chip, I don't see anything on Pin 12, but that could be normal as it is operating in RMII Slave Mode..

I guess I have screwed it by incorrectly connecting the magjack, maybe by floating the center taps by not connecting to GND via a 100nF cap, or maybe connecting them in reverse, or maybe shorting some pins of the PHY when trying to measure them by the scope probe..

I have ordered a new chip and will try and notify of the results. But I think it will not be early due to new year..

Thank you for your help

2

NXP^TM M522XX, KINETIS and i.MX RT / Re: Teensy 4.1 with Ethernet Kit

« on: December 29, 2020, 01:14:13 PM »

Thanks for this, Mark! It started sending out the data..

However, it seems like I have fried my PHY chip, as I cannot see any voltage on RBIAS Pin(Pin 14)..

3

NXP^TM M522XX, KINETIS and i.MX RT / Re: Teensy 4.1 with Ethernet Key

« on: December 28, 2020, 05:46:39 AM »

Hello Mark,

What would be the modifications for the PHY to work?

I have run the 1.4.12, however MDIO line is always high, although there is some clocking at 2.5MHz at power-up. Also, when I try to "Dump PHY registers", the iMX restarts and last reset cause shows "???" but I think it was a watchdog reset.