=> master
AmebaD v202007 Getting Started Guide https://github.com/ambiot/amazon-freertos/blob/master/AmebaD_Amazon_FreeRTOS_Getting_Started_Guide_v1.5.pdf
AmebaZ2 v202007 Getting Started Guide https://github.com/ambiot/amazon-freertos/blob/master/AmebaZ2_Amazon_FreeRTOS_Getting_Started_Guide_v1.0.pdf
=> branch : amebaD-v202002
AmebaD v202002 Getting Started Guide https://github.com/ambiot/amazon-freertos/blob/amebaD-v202002/AmebaD_Amazon_FreeRTOS_Getting_Started_Guide_v1.4.pdf
=> branch : amebaz2-v1.4.7
AmebaZ2 1.4.7 Getting Started Guide https://github.com/ambiot/amazon-freertos/blob/amebaz2-v1.4.7/Ameba%20Z2%20Amazon%20FreeRtos%20Getting%20Started%20Guide.pdf