MAX77840 sample code/initial code

Only Maxim ATE products are supported on EngineerZone at this time. Over the next several months, you will see more Maxim products being supported in EngineerZone. Please visit one of the technical support pages on our newly integrated website below for assistance with Maxim Integrated products.  

EN -  https://www.analog.com/en/support/technical-support.html# 
CN - https://support.analog.com/zh-CN/technical-support/ 
JP - https://support.analog.com/ja-JP/technical-support/