with LAN8710A
have not remove RM3
have cut the “pullup” line between LAN8710A and RM3
so we can use the “pullup” later for other gpio by connect on the pin
steps:
we must
1) cut RM3 single line (LAN8710A) CRS_DV pulled up node
2) remove R21 ( pulled up )
3) cut GPIO18 line (backside ) from RM3 (LAN8710A CRS_DV) line
4) connect on header 19(“CRS_DV”) ,26(“I2C_SDA”) by wire
pics:
====
before cut RM3 single line
![Image](http://www.esp32.de/ethphy/before_cut_rm3_removed_r21.png)
and here steps
![Image](http://www.esp32.de/ethphy/step1_crs_dv_0.png)
![Image](http://www.esp32.de/ethphy/step2_cut_GPIO18_line_from_crs_dv.png)
controll:
you will see only a fine cut on the RM3 sinlge line
R21 was removed
![Image](http://www.esp32.de/ethphy/controll_cut_rm3_removed_r21.png)
GPIO18
we can use it later by connect a wire and connect to a pinheader pin
so we save the gpio18 for later. we can connect the gpio18
then on backside where we cut the line from CRS_DV
this node to GPIO18 has also disturbed
now i will remove the flying osz and
i will use “GPIO16” as int CLK again and
will update infos here at weekend
best wishes
rudi
![Wink ;-)](./images/smilies/icon_e_wink.gif)