[Fwd: Re: [gta02] Fwd: PS: high rate of broken devices even on prodction test. DESIGN BUG!]

[Allen Chang]

Dear All:

I found that if I don't plug the USB (include D+ and D- data) , the PMU 
setting will not change in U-Boot.
I remove U4905 and short the U4905( RT9711)'s VIN and VOUT. I set U4904 
(AAT1275) to output 5V.
I set  MBCC7 =3 (suspend) and MBCC8 = 0, the total current doesn't  
still increase

Therefore, using 0 ohm resistor replace U4905 is maybe  a solution.

Best wish
  Allen Chang

Allen Chang 提到:
> forward~
>
> ------------------------------------------------------------------------
>
> 主旨:
> Re: [gta02] Fwd: PS: high rate of broken devices even on prodction 
> test. DESIGN BUG!
> 寄件者:
> Allen Chang <allen_chang at openmoko.com>
> 日期:
> Thu, 17 Apr 2008 11:39:47 +0800
> 收件者 (To):
> Werner Almesberger <werner at openmoko.org>
>
> 收件者 (To):
> Werner Almesberger <werner at openmoko.org>
> 副本 (CC):
> GTA02 <gta02 at lists.internal.openmoko.org>
>
>
> Hi Werner:
>
> I set the MBCC7=3 (suspend) and MBCC8=0. I found the USB doesn't 
> supply any current for GTA02.
> But I plug the USB power into GTA02, the PMU will change it's register 
> status. The MBCC will change back "1".
> Can someone give me a SW which the MBCC always is "3"?
> Therefore, I can make the DC-DC output 5V and found what happen?
>
> Best Wish
> Allen Chang
>
>
>
> Werner Almesberger 提到:
>> Wolfgang Spraul wrote:
>>  
>>>> o- either set max allowable USB current of PCF50633 to 0mA when in  
>>>> hostmode,
>>>>       
>>
>> That should work if we choose "suspend" in MBCC7.usbdevstat and set
>> MBCC8.usbenasus = 0
>>
>> See also Figure 38 and Table 103.
>>
>> Need verification, though. The PMU is complex enough for surprises ;-)
>>
>> - Werner
>>
>> _______________________________________________
>> gta02 mailing list
>> gta02 at lists.internal.openmoko.org
>> https://lists.internal.openmoko.org/mailman/listinfo/gta02
>>   
>
> _______________________________________________
> gta02 mailing list
> gta02 at lists.internal.openmoko.org
> https://lists.internal.openmoko.org/mailman/listinfo/gta02
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.openmoko.org/pipermail/openmoko-kernel/attachments/20080418/99681ff8/attachment.htm 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: allen_chang.vcf
Type: text/x-vcard
Size: 170 bytes
Desc: not available
Url : http://lists.openmoko.org/pipermail/openmoko-kernel/attachments/20080418/99681ff8/attachment.vcf