Add Ameba info to README.md

README.md

@@ -71,3 +71,28 @@ A list of platforms currently available in this project.
 Platform name  | Supported MCU(s)                                                       | Arduino Core | Source SDK (PIO framework)
 ---------------|------------------------------------------------------------------------|--------------|--------------------------------------------------------------------------
 `realtek-ambz` | Realtek [AmebaZ](https://www.amebaiot.com/en/amebaz/) SoC (`RTL87xxB`) | ❌            | `framework-realtek-amb1` ([amb1_sdk](https://github.com/ambiot/amb1_sdk))
+
+### Realtek Ameba
+
+The logic behind naming of Realtek chips and their series took me some time to figure out:
+- RTL8xxxA - Ameba1/Ameba Series
+- RTL8xxxB - AmebaZ Series
+- RTL8xxxC - AmebaZ2/ZII Series
+- RTL8xxxD - AmebaD Series
+
+As such, there are numerous CPUs with the same numbers but different series, which makes them require different code and SDKs.
+- [RTL8195AM](https://www.realtek.com/en/products/communications-network-ics/item/rtl8195am)
+- RTL8710AF (found in amb1_arduino)
+- [RTL8711AM](https://www.realtek.com/en/products/communications-network-ics/item/rtl8711am)
+- [RTL8710BN](https://www.realtek.com/en/products/communications-network-ics/item/rtl8710bn)
+- RTL8710BX (found in Tuya product pages)
+- RTL8710B? (found in amb1_sdk)
+- RTL8711B? (found in amb1_sdk)
+- [RTL8710CM](https://www.realtek.com/en/products/communications-network-ics/item/rtl8710cm)
+- RTL8722CSM (found in ambd_arduino)
+- RTL8720DN (found in ambd_arduino)
+- [RTL8721DM](https://www.realtek.com/en/products/communications-network-ics/item/rtl8721dm)
+- RTL8722DM (found in ambd_arduino)
+- and probably many more
+
+Different Ameba series are not compatible with each other. Apparently, there isn't a public SDK for AmebaZ that can support C++ properly (yet).