I know that USB needs 5V. I mentioned that in my question. Let me put it in 
this way. I have a 5V supply. Instead of connecting it to the mains or USB, 
I connect it to the TP5. I'm supplying 5V to beaglebone black, but the USB 
host does not work as long as I have the thermistor soldered.
 

On Monday, 30 September 2013 20:25:39 UTC+8, Gerald wrote:
>
> USB needs 5V. I keep bringing this fact up. If you run from the battery in 
> this fashion, you have no USB host function. There is no SW fix for this.
>
>
> Gerald
>
>
> On Sun, Sep 29, 2013 at 9:51 PM, <[email protected] <javascript:>> wrote:
>
>>
>> Hi,
>>
>> My beaglebone black is powered using single cell LiPo battery via TP6. (A 
>> 10kohm resistor soldered btw TP7 and TP8 to act as thermistor). The board 
>> powers up fine and does everything except the USB host is not working. I 
>> know USB is supposed to work with 5V, thus while debugging I used a 5V 
>> supply to connect to TP6. The board power up fine yet the USB host is still 
>> not working. While checking the IC U8, it's found that the voltage reading 
>> of pin4 (enable pin) of U8 is 0V. The AM3359 IC is not providing output to 
>> the USB1_DRVVBUS, i.e. the AM3359 decides to turn off the USB host when 
>> battery is used. Any advice where to change in the device tree or what to 
>> do so that the USB host won't be disabled? The OS used is Debian Wheezy 3.8 
>> kernel.
>>
>> Thanks.
>>
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>

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