minor fixes

Author: pagong

README.md

@@ -22,6 +22,8 @@ CircuitPython demos running on various RP2040 boards
 ## WaveShare RP2040-ETH
 [This](media/RP2040-ETH-details-inter.jpg) is a tiny **Pico** [clone](http://www.waveshare.com/wiki/RP2040-ETH) with USB-C port, 4MB flash and an onboard Ethernet interface.
 
+- some usage [hints](microPython/RP2040-ETH.md)
+
 ## WaveShare RP2040-LCD-0.96
 [This](media/RP2040-LCD-0.96-details-7.jpg) is a tiny **Pico** [clone](http://www.waveshare.com/wiki/RP2040-LCD-0.96) with USB-C port, 2MB flash and a 160x80 pixel colorful LCD display.
 

microPython/RP2040-ETH.md

@@ -7,15 +7,6 @@
 - download specs from [here](https://www.wch-ic.com/search?q=CH9120&t=downloads)
 
 
-## Code and documentation for CH9121 chip for Pico
-
-- WaveShare [site](https://www.waveshare.com/pico-eth-ch9121.htm) and [wiki](https://www.waveshare.com/wiki/Pico-ETH-CH9121)
-- [examples](CH9121/)
-
-- Github examples by [Danielerikrust](https://github.com/Danielerikrust/CH9121)
-- Github examples by [Splashaudio](https://github.com/Splashaudio/Pico-ETH-CH9121_basic
-
-
 ## The internal connection between CH9120 and RP2040:
 
 | CH9120 pins | RP2040 pins | Function |
@@ -26,3 +17,12 @@
 | CFG0 | GP18 | Network configuration enabled pin, low level for serial debugging mode |
 | RSTI | GP19 |	Reset, active LOW |
 
+
+## Code and documentation for Pico-ETH-CH9121
+
+- WaveShare [site](https://www.waveshare.com/pico-eth-ch9121.htm) and [wiki](https://www.waveshare.com/wiki/Pico-ETH-CH9121) and [examples](CH9121/)
+
+- Github examples by [Danielerikrust](https://github.com/Danielerikrust/CH9121)
+- Github examples by [Splashaudio](https://github.com/Splashaudio/Pico-ETH-CH9121_basic)
+
+