Quote:
Originally Posted by knc1
If you meant vcc to the board:
Almost always, it is provided from the USB power on the USB cable.
In general, it depends on the device.
If you meant the **I/O reference voltage (1v8)** to the board:
You can take the external 1.8 volt reference from a Li/Fe chemistry battery.
See: https://www.mobileread.com/forums/sho...85&postcount=8 |
yes. i meant I/O but my board's i/o voltages are 3v3 and 5 volt.
i know if someone have a 1v8 board, he can connect it directly to his kindle mobo but this is my problem : i have 3v3 and 5v usb to uart board and i know i must connect it whit level shifter. but how can i conncet the i/o voltage??
is there a 3v3 or 5v point on the kindle mobo??
this is so simple but i became so confused
