Update README.md

Author: gotfredsen

README.md

@@ -5,6 +5,20 @@ Core CPU Module based on ATSAMD21G18.
 This module can be purchased on [Xinabox CC](https://xinabox.cc/products/CS11/).
 
 ## General Description
-This ☒CHIP forms part of the core modules. The SAM D21 is a series of low-power micro-controllers using the 32-bit ARM® Cortex® M0+ processor.
+This xChip forms part of the core modules. The SAM D21 is a series of low-power micro-controllers using the 32-bit ARM® Cortex® M0+ processor.
 
-The CS11 ☒CHIP is housed in an extremely compact 2U×2U ☒CHIP with four connection ports.
+The CS11 xChip is housed in an extremely compact 2U×2U xChip with four connection ports.
+
+## Arduino
+- Follow the instructions for [programming the Arduino Zero](https://www.arduino.cc/en/Guide/ArduinoZero)
+- You need an IP02 (A/B in B position) or IP03 to program the CS11
+- Connect the CS11 to the IP0x using a small connector for USB and a big connector for power.
+- Plug the circuit into your USB port on your computer.
+
+## Arduino pins
+| Description | Arduino Pin # |
+| :--- |:---: |
+| SD Card - CS | `3` |
+| RGB LED Red | `11` |
+| RGB LED Green | `12` |
+| RGB LED Blue | `13` |