Team,
I am using the TUSB9260 EVM and I am trying to configure the evm to output more then 100mA. This seems to be the max I can get out. Is there a way I can configure it to out the Max?
Also, how can I ensure that the output power is limited without relaying on the host?
Thanks in advance for the help!
Hello Scott
One Way to solve it is to use the TUSB9261 Flash Burner and modify the bMaxPower descriptor. THe steps to modify this descriptor are the following:
1.- Open the Flash Burner Utility.( http://www.ti.com/litv/zip/sllc414c ).
2.- Load the proper firmware. (Last Firmware version http://www.ti.com/litv/zip/sllc416g ).
3.- Open the Advanced Descriptors Editor.
4.- Configure the basic options as You need (UAS, HID, RWC, device self-powered).
5.- Modify the bMaxPower descriptor to the desired value (bMaxPower is an hexadecimal and it represents the max current drawn from the upstream port, multiplied by 2 for USB2 and by 8 for USB3. Remember to follow the USB3 power specifications).
NOTE: bMaxPower only configures the maximum current supplied from the Host via Vbus. If You configure the TUSB9261 as a bus-powered device, the SATA device will draw the current from Vbus but not from the TUSB9261; meanwhile if You configure the TUSB9261 as a self-powered device, the SATA device will draw the current from an external power source, which must be capable to provide the sufficient current for both, the TUSB9261 and the SATA device.
Regards,
Diego.
