361
Discussion - Hardware / Re: UM245R - EPROM bus current limit setting
« on: January 19, 2021, 11:17:57 AM »
Hello,
The MaxPower Descriptor defines the maximum power that may be drawn by the peripheral from the USB host. The USB host will read this value during enumeration to determine if it can provide the desired current draw the device is requesting. If for example you change this setting to 500mA and the USB host cannot provide this much power to the device, then the device will not enumerate.
The MaxPower Descriptor relates to Bus Powered devices, when using a Self Powered design you can set this value to 0mA.
Best Regards,
FTDI Community
The MaxPower Descriptor defines the maximum power that may be drawn by the peripheral from the USB host. The USB host will read this value during enumeration to determine if it can provide the desired current draw the device is requesting. If for example you change this setting to 500mA and the USB host cannot provide this much power to the device, then the device will not enumerate.
The MaxPower Descriptor relates to Bus Powered devices, when using a Self Powered design you can set this value to 0mA.
Best Regards,
FTDI Community