100ma, 500ma and 900ma current availability indication without the use of an MCU

[coromonadalix]

while i did understood  what the op asked

only thing / explanations so far are :

http://dangerousprototypes.com/docs/Designing_USB_Devices_for_proper_current_and_MaxPower

it is the connected device who need to be controlled  "by itself or added circuitry",  not the host by design 

https://electronics.stackexchange.com/questions/5498/how-to-get-more-than-100ma-from-a-usb-port
https://www.beyondlogic.org/usbnutshell/usb5.shtml

or the attached pdf  who explain a few things


or theses links
https://www.infineon.com/dgdl/Infineon-AN2361_USB-Powered_Battery_Charger_for_NiCd_NiMH_Batteries-ApplicationNotes-v06_00-EN.pdf?fileId=8ac78c8c7cdc391c017d072c8b335163

https://www.silabs.com/documents/public/application-notes/an0046-efm32-usb-hardware-design-guidelines.pdf
https://www.infineon.com/dgdl/Infineon-AN2361_USB-Powered_Battery_Charger_for_NiCd_NiMH_Batteries-ApplicationNotes-v06_00-EN.pdf?fileId=8ac78c8c7cdc391c017d072c8b335163

yeah i do know its about chargers,  but maybe something could be useful in all of this ??