[Arm-netbook] [EOMA68] RS232 on SoCs

[Vladimir Pantelic]

On 08/31/2013 04:59 PM, Henrik Nordström wrote:

>
> It's not about excessive current. It's about powering the chip via I/O
> pins instead of power pins. Now the Allwinner chips do not really power
> up via the I/O pins, but there is at least sufficient power leakage back
> to the power rails to cause problems for the AXP power management
> controller chip, and maybe some internal I/O functions as well.

and a 1k series resistor on the UART line is not enough to stop this?